LOLLLL. Babolat has a 1 year warranty on the racquets. Now go call in and tell them what happened. Your honesty will take a big toll in this. They can tell if you slammed the racquet and whatnot. So if you really did break 4 of them, i suggest asking Babolat for replacements. With those replacements go sell them on E(bay) or sell them to TW/Classifieds.
Racquet : Prince Youtek 6.1 Tour 531g 17x19
Strings : Steel Wire ( 21G ) <- Prototype