No service from my service provider

Hi good day I had such bad service from fnb,about repairs on a phone they sold to me the coneX2 I'm still being debited my phone could not charge I told them thats the only problem,they said me to we fix I went there we fix said they dont fix fnb phones any more they say there is always a problem with service from fnb,so I toke the phone in branch to parow fnb,they told me telephonically and thw manager Natasha to please book my phone in for repairs they said it will cost me R980 I said it almost the price of a new phone,I left me phone in the branch Natasha never booked in my phone and I was in communication with fnb care and in branch for 2 months with this problem and nobody helped me I had to take my phone they dis not repair it and they just wanted me to pay for a broken phone they said there is nothing they can so this is from in branch manager Natasha in parow Cape town branch and fnb care and telephone department nobody helped me.