Very disappointed in FNB Connect

I purchased a phone for my husband for Christmas 2016 at a FNB branch. We have had nothing but problems with this phone. It kept overheating after 2 weeks. They did replace it but it has continued to do so. I wanted to pay extra and get another make but they were very unhelpful and surly on the phone. The phone is just over a year now and suddenly we have a blank screen. This a Conexis X2 model. I am told this is now out of warranty and it my problem. They will continue to bill me 199 rand per month for another year! My husband is 75 and keeps his phones for years. It's never been dropped and is like new. It's not for buisness just really calls. I have been with FNB for 25 years and feel l have been badly treated. The branches say they don't handle any FNB connect problems. It's so hard to speak to anyone as the call centre really couldn't be bothered. I feel like closing my account at the bank Very disappointed in both the phone and device.