Terrible service, did not take any responsibility....

Terrible service, did not take any responsibility. only a word sorry. my phone was functioning well before i gave to them for a new screen, after they replaced the screen, my phone can not be able to turn on anymore, so they put it back my cracked screen, but my phone just totally dead. any without any explanation, only excuse. now i lost all my data.I think some of technicians are not have experience at all. now i have to buy a new phone.