[daqrinsa]

Do you think it‘s better to just ask where my order is, that I still didn‘t receive it

^ This.

Simply say you're still waiting for the package to arrive.

Should I say I still want them or that I alteady bought something else as a present?

Don't go Into detail as yet.

First wait and see how your claim Is progressing.

Thank you. I see, so first being broad and general so I won‘t hurt myself with unnecessary details right?

What should I avoid saying? Is there any common mistake I should avoid?

They might ask me whether I still want them to be shipped or if I want a refund, right?