Chief Keef screwed over breast cancer patients by bailing out of a Cleveland charity concert hours before he was supposed to go on stage. TMZ claims, “In court docs, Kim Productions claims it paid Keef a $15K deposit … to perform at the RapCure cancer benefit last June. The balance — $10K — was supposed to be paid at the event. Kim Prods. says the day before the event, Keef demanded a $2,500 advance to cover travel expenses. Kim says the money was wired … and Keef’s agent claimed Keef was on his way. According to the lawsuit … Keef was a no show … so the concert was cancelled and ticket holders got their money back … which meant the charity ended up in the red.” The company is trying to charge Keef $26K, which is the money it paid to Keef plus the amount spent on the theater, lights, equipment, advertising and the refunded tickets. The lawsuit also includes an $88 charge for an order of chicken wings … called in by someone on Keef’s tour bus.. LOL!