We've had these as well and tried to have them removed by EBay but not a chance. In one case we contacted the buyer about it and she responded saying she clearly remembered leaving us 5 stars because she was very happy. But still the one for as described was a 3. So we reckon EBay are fiddling with them. Even when we tried to have them changed with the messages from the buyer no go. So I think you are stuck with it unfortunately.