Hello, I am after some advice please as am a bit of a novice and dimbo! I sold a collection only item and after a few messages from me they asked me to relist. I have offered to the next highest bidder. Do I have to do something to cancel the first one please? Also, should i give them negative feedback. I would be inclined to just let it go but then they might make a habit of this frustrating thing. if i give them negative feedback can they retaliate and give me negative feedback or can they only give feedback if they paid for the item? Thank you.