Faulty new phone

I renewed my contract with Cell c in July 2015, got two Blackberry Leaps. The one became faulty within 3 months, sound disappeared totally, could not hear anything. Took it back to the store. The handset was sent away to have a new speaker fitted and they were also told not to format the phone. 3 Weeks later the handset was picked up by me. It had been formatted all my files were deleted, priceless photos of work being done. Photos of an accident that I was involved in and now I will lose my case as they are gone. And guess what, STILL NO SOUND.<br> <br> I returned it to the store the next day, just for it to be sent back again. I was told that it has to be evaluated first in order for them to replace the handset. There is no ways that I can trust that phone should it come back. I demand a new phone. There is no way that I can get hold of the CEO to complain about the useless staff that he has working for him. If I do not get a new phone I will cancel my contract.