Bishojosenshi

So, this isnt the first time the mp has **bleep**ed me over, i have bought things in the past and didnt recieve them after paying, and after contacting the sellar somehow removed them from my order history and was never refunde the money. NOW I bought something the 17th for less than a dollar, was charged a dollar and told i was to be refunded and was never refunded the 78 cents to my account or to lindens. somebody help lol I dont care much about the first one, i should have done more about it when it happened and who it was but i honestly dont remember. so that that, but now the mp? help!