Rent-A-Center

i rent it this tv on sept 28, 2008 and i made all payment up to date and i finish paying it already but while i was paying i had call rent a center and notified them that the tv was having some problems wit the lamp so they came and pick it up to make a mess up job on it cause now is worst than before and they dont want to change my tv or reimburst me back wat i pay for it i really need help cause i paid $4, 381 for a broken tv i think they should let me know that this tv was damage before a made the full payment can some one please tell wat i have to do i try calling but the manager always hiding he never there i go in person and the same thing i need help this ppl cant be saleing wroken items is not fair the tv is a sony model #kdf50e20000 i called the sony company and they came to see the tv and they told me to return it back but the rent a center doesnt want to talk to me so i come here to get help, if ya could see in the top is a red color and in the bottom is blue and it say when i turn it on that the lamp need to be replace and thats why rent a center took the tv first of all to fix it, they never send it to fix they try to do on they own without knowing wat they was doing all i need to know were to go to get help please
thank you