@Samuel-Albert I'm not exactly sure why you have these problems, but, for example, if you want to get the Soundpool "Blades & Runners", there are three different articles available: Part 1, Part 2 and the Bundle of Part1+2. And there is an option to get the loops for commercial and non-commercial usage.
It looks like the coupon is only valid for Part 1 and maybe non-commercial usage. So if you try to get the other two articles, or commercial usage, this won't work.
For refunds you should contact customer support at infoservice@magix.net and ask them for a refund.
Since we are all users like you we cannot help you with refunds.
@SP. Indeed I have, that is actually how I got into this mess in the first place. The button itself is greyed out. I'll just leave it for now and email the support to hopefully get this all fixed up.
Now to figure out how to close this thread and then delete it 😂