Mi reklamaciis, kaj klientservo proponis kompenson.

They are related in form, but they do not mean the same thing.

Reklami means to advertise or to promote.
Reklamacii means to make a complaint or claim, especially as a customer about a product or service.

So in this sentence, Mi reklamaciis is about filing a complaint, not about advertising anything.

The dictionary form is reklamacii.

In Esperanto, -is marks the past tense. If you remove -is, you get the verb stem reklamaci-. Then you add the infinitive ending -i, which gives reklamacii.

The double i is normal here: one i is part of the stem, and the second i is the infinitive ending.

Because Esperanto uses very regular verb endings:

-as = present
-is = past
-os = future
-us = conditional
-u = imperative or jussive
-i = infinitive

So reklamaciis means the action happened earlier. The speaker already made the complaint.

It is a valid and useful verb, but it is somewhat specific.

Reklamacii is especially appropriate when a customer complains formally about a purchase, service, delivery, defect, bill, and so on. It has a customer-service feel.

A more general verb is plendi, which means to complain in a broader sense.

So these are different in nuance:

Mi plendis = I complained
Mi reklamaciis = I made a customer complaint / filed a complaint

You could also say Mi faris reklamacion, which is another natural way to express the same idea.

Because Esperanto very often forms compounds by joining roots into a single word.

Here the idea is built from:

klient- = client/customer
servo = service

Together they form klientservo, meaning customer service.

This is very common in Esperanto. Compounds are usually written as one word, especially when they function as a single idea.

Because in Esperanto compounds, the earlier parts usually appear as roots, not as full dictionary words with their endings.

The full noun is kliento, but the root is klient-. When it becomes the first part of a compound, the -o is normally dropped:

klient- + servo = klientservo

Only the final part gets the grammatical ending that shows the whole word is a noun, adjective, and so on.

This is why Esperanto compounds often look shorter than English learners first expect.

Because it is the direct object of proponis.

In Esperanto, the direct object usually takes -n. Here, the thing being offered is kompenso, so it becomes kompenson.

You can think of it like this:

klientservo proponis kompenson
Customer service offered compensation

The service is doing the offering, and the compensation is the thing offered, so kompenson gets -n.

Esperanto uses la only for something definite, like English the.

For kompenson, the lack of la suggests some compensation or compensation in a general sense, not a specifically identified compensation package already known to both speaker and listener.

For klientservo, the absence of la can sound like a general or institutional reference, similar to how English sometimes says customer service without the. In a specific context, many speakers might also say la klientservo, especially if they mean a particular company’s customer service department.

So the article choice depends a lot on context.

Not necessarily. The sentence is fine as it is.

With proponi, Esperanto can mention:

• the thing offered: kompenson
• the person it is offered to: al mi

So a fuller version could be:

Mi reklamaciis, kaj klientservo proponis al mi kompenson.

But if the recipient is obvious from the context, Esperanto often leaves it unstated. Since the speaker is the one who complained, it is easy to understand who would receive the compensation.

Yes, Esperanto word order is fairly flexible, but the sentence as given uses the most neutral order: subject + verb + object.

klientservo proponis kompenson is the most straightforward way to say it.

Because kompenson has -n, you could move it for emphasis and still keep the meaning clear, but that would sound more marked or stylistic:

Kompenson proponis klientservo.

That is possible, but the original version is the most natural choice for ordinary, neutral language.

Yes. Both are understandable and natural.

Mi reklamaciis is a single verb.
Mi faris reklamacion uses the noun reklamacio with fari.

The one-word verb can feel a bit more compact, while the noun phrase can feel a bit more explicit. In practice, both work.

A learner should mainly remember the nuance: this is not just any complaint, but a complaint in a customer or service context.