Paying for a broken phone - Cell C refuses to fix

My Samsung S7 Edge crashed/switched off and since then wont switch back on or charge.There was never a problem with the batter prior to this and the phone was not dropped. I took it to Samsung at Clearwater mall. The sales staff informed that as ALL SERVICE PROVIDERS cover the cost and as the phone is on contract and not paid off it is still under warranty. They referred me to " We Fix" downstairs at Clearwater Mall. The lady at the front desk informed me that ALL SERVICE PROVIDERS except CELL C covers repairs and if I want to book the phone in I will have to pay the bill. I spoke to my friends and told them what Cell C has done to me. They were shocked as both of their phones broke and VODACOM COVERED THE COST of the repair. I want to be very clear, I am highly disgusted as to how I have been treated as a customer, I have been taken advantage of after being a loyal customer for many years, well not anymore.. you will never see me again after all these years. I will ensure that every person I know, which happens to be alot of people ( be careful who you upset..) knows not to do business with you cell c.I phoned cell c and was told they dont/wont cover anything.I still have to pay cell c minus the minutes etc R2000. I want Cell C to explain to me how is it that I must continue to pay them for a broken,dead,useless phone?