Some more advices for you is:
Tell your bank that their Facebook page is only bought reviews. Their phone number on their page aren't linked up. (Not an UK phone number).
Try also to login on skinmagate or something like that, not only steam. You will link through steam when logged in there (if possible).
Try send an email to the link on skinmagate. Saw reviews on Facebook that they don't reply there. After couple of days. Give that they don't reply on mails to your bank on the "page" they claim you bought on.
Unsuccessful login is actually enough to claim that you have not recieved what they are saying.
Good luck
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