depop took my money twice

i ordered a bag for 265 and the seller didnt disclose it was fake until after i ordered so they refunded me and depop decided to TAKE ANOTHER 265 FROM MY ACCOUNT so i’m now 530 down and support is no help all they did was confirm i’m getting my original refund but what about the other 265 they decided to take im not sure what to do from here my bank was zero help and i tried depop help and i’m not getting much help either how do i get my money back