Extra items 9n the return order

I placed an order then when delivered I logged a return. On that return order inside the box I putted my extra items there and they still new some of them were bought from superbalist and some from other online shopping store. Those items were not part of the return item. I sent emails amd called several times and I am not getting any feedbacks. Yesterday when was browsing their app they advertising my items which is they now selling them instead of bringing back my thing because they saw I made a mistake putting them on the return bag. I am very heart broken.