Cell C Bad Service/ Attitude

Have a contract with Blackberry Z10 within warranty phone was replaiced by Cape Gate Branch(no problem). 5 days after new phone software problems was on holiday booked repairs/replace phone in Vredenberg Cell C (bad service) Got after 3 months arguing received a refurbished phone. 3 days into again software problems and Manager in Cell C Tygervalley told me that i am not paying monthly for my phone it is a perc and they will not replace my phone but they will sell me a new contract. Never in my life did i experience such arrogant attitude after i am paying their salary. What am i then paying for Cell C will never never get a cent from me again and i will make it my mission in life to inform everybody around me