Sorry to hear about your troubles Jalle19 this is the first I have heard of alibaba forcing you to be come a shipping agent for the company that scammed you.
Hopefully master card will step in and force them to do the right thing.
Keep a copy of all the communication and send it to mastercard and no matter what you do, do not cancel the dispute.
I also recommend NKON unlike alibaba they will follow the EU rules and regulations, you may pay more but the bs of alibaba worth the savings, I think not.
Like you I got burned on cells, no return, no recourse, alibaba ruled in favor of the scammers at xuba. I foolishly paid with bank transfer because I wanted to save on transaction fees so there was nothing I could do.
Never agian.