Last summer getting ready for Christmas early I purchased what was advertised as a brand new tablet. Item arrived boxed and factory sealed looking very much brand new. However once opened on Christmas Day far from new item was found not able to be used battery dying quickly and when checking history there was a history prior to the purchase date. This proves not new. However as out of the eBay return guarantee they refused to help.and seem happy to allow a fraudulent seller to keep using he platform as the seller is still on there. For months I keep messaging the seller however they accept no fault although proven and will only offer a 10 percent discount on a futute purchase. What can I do to escalate the matter