sony xperia z5 defective all the time

I renewed my vodacom contract on 2015-10-28 and took a sony xperia z5. I chose a gold one and bought a gorilla screen protector which was fit in store. The phone was defective the screen couldn't turn on during a call so I couldn't end a call or access my phone during a call. The phone was send in and replaced by a black phone without the screen protector. There was a problem with the ringtones so I took the phone in again. Then the charger stopped working. Then the loudspeaker broke. The phone and charger were send in on 22/12/2015. Since I bought the phone I used it for less than a month continuously. I am paying a phone that is always in for repairs. It is unacceptable that a new phone is at repairs more than with the owner. Please give me a better more reliable phone than the sony xperia. I will also advise my family and friends not to opt for the sony.