Reclamo el reemborsament al servei d'atenció al client.

Catalan often leaves out subject pronouns when the verb ending already shows who the subject is. Here, reclamo ends in -o, which marks first person singular in the present tense, so (jo) reclamo means I claim / I request.

You could add jo for emphasis, but it is not necessary: Jo reclamo el reemborsament... = I am the one claiming the refund...

Here reclamo comes from the verb reclamar and means I claim, I request, or I demand.

With el reemborsament, it means something like: I am claiming/requesting the refund.

Depending on context, reclamar can also be related to making a complaint, so it sometimes overlaps with to complain, but in this sentence the direct object el reemborsament makes the meaning clearly about asking for the refund.

El is the definite article, so el reemborsament means the refund.

Catalan uses the definite article when the speaker has a specific refund in mind, which is very natural here: it is the refund owed for a particular purchase or payment. Using un reemborsament would sound less specific, more like a refund in a general sense.

So:

Reclamo el reemborsament = I am claiming the refund
Reclamo un reemborsament = I am asking for a refund

Al is a contraction of a + el.

So:

a + el = al

This is very common in Catalan. In this sentence, al servei d'atenció al client means to the customer service department.

Because Catalan is marking the person or service you address the request to.

So in Catalan: reclamar alguna cosa a algú / a un servei
literally = to claim something to someone / to a department

In natural English, though, we often say: I request a refund from customer service

So the preposition is not translated word-for-word. Catalan uses a because customer service is the addressee of the request.

Because de becomes d' before a word beginning with a vowel.

So:

de + atenció → d'atenció

This is a normal Catalan contraction, similar to: l'empresa, d'acord, l'atenció

It is a standard expression meaning customer service or customer support.

Literally, it is something like: service of attention to the customer

But you should understand it as a fixed phrase, not word by word. In real Catalan, servei d'atenció al client is the normal way to refer to the customer service department.

Because Catalan often uses an article where English may not.

Here, al client is part of the fixed expression atenció al client. The singular el client can be used in a generic sense, meaning the customer in general, or customers as a category.

So atenció al client does not mean attention to one specific customer. It means customer care / customer service.

Yes, it is correct and natural, especially in a formal or assertive context.

That said, reclamo sounds a bit stronger than simply I ask for. It suggests that you are asserting a right, not just making a polite request.

A slightly softer alternative would be: Demano el reemborsament al servei d'atenció al client. This means I ask customer service for the refund.

So the original sentence is fine, but its tone is more firm.

Sometimes, yes, but they are not always exactly the same.

Reemborsament focuses on the money being paid back: refund, reimbursement.
Devolució often means return, and sometimes by extension refund.

So if you want to be precise about getting your money back, reemborsament is a very good choice. If the context is about returning a product, devolució may be more common.

Yes. Catalan word order is fairly flexible.

The original sentence: Reclamo el reemborsament al servei d'atenció al client. is neutral and straightforward.

You could also say: Al servei d'atenció al client, reclamo el reemborsament. This puts more focus on customer service.

But the original version is the most neutral and natural for a simple statement.