Ordered boots from a seller on ebay (boots4all). A few days after, I received the boots but the size was not right, after I contacted them, they offered me to pay for the shipping myself and then they will reimburse me and will send me a different pair.
I agreed and waited for a few weeks and heard nothing from them. Even after I contacted them and asked them to take care of it like they promised, they ignored me and never sent me the other pair, which caused me to lose $54 just by sending the first pair they sent me back to them (From California to Australia).
The sad thing was that even after I contacted ebay, they said that the seller tricked me but they won't do anything since it's "outside" ebay, even though I kept all my conversations with them on the ebay chatter.