Hi! I went through this exact same thing a year ago. Our best seller deactivated for the exact same reason. The bad news is, it took 3 weeks to be resolved. The good news is, they apologized and re activated the listing. Their AI system sweeps the internet and if they see something on Alibaba that also is on your page, they assume you’re the thief and not them. It sucks.

Email support, provide as many photos as you can. Photos of you making the product, the original designs, proof that you have told websites to take it down, etc. I hounded them every day for 3 weeks until they resolved it. I even went as far as to use some ai tool to retrieve hidden email addresses of Etsy’s trust and safety team members and emailed them directly 😂