bad customer servise

i upgraded end january and in april my camera stopped working.phone was taken for warranty assessment.i was told to go back to the store for a new phone.wanted to take sony experia z3 cos i was not happy with the sony ezperia m2 aqua, i was told that i have to take the m2 aqua again , my argurment was I am taking an expensive package and i dont see why cant they help me, i was given a choice of either take the m2 aqua ,cancel my contract or wait for my next upgrade. I am dissapointed with the way my complaint was handled i've been mtn customer for years --- what made me even more upset is the attitude that they gave me