12-01-2018 2:43 PM
The best thing would have been not to pay the postage and then open a not received dispute
Now you have paid the postage then there is no way you can force the seller to repay it
Ask them to refund you
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There is nothing ebay would do about it but if the stamps were fake then I am suprised that RM did not do anything as your seller was trying to defraud them.