FNB Mobile Device

I've always been FNB ambassador even though I work for another bank but now they really showed me the true meaning of "How can we frustrate you". I bought a phone from the institution and the device gave me endless problems. I reported and was advised to take it to the repair center and this didn't resolved the issues. Every three months the phone will have to be booked in for at least a week..so in a year I'll lost something like a month (or maybe less) without a phone. They eventually decided to replace it with a new phone and hardly a month the newly replaced phone started with the same issue. I called them and they fetched the phone in January - I have been without phone since them and Im paying for it monthly, its almost two months now. When I asked FNB to give me a different model that is either same priced or more (as I am prepared to pay extra) they refused and instead I was somewhat forced to settle for a lesser model phone - I tried and ask for something that is currently on their site but they refused. I was not given a choice even after I expressed that I will pay more if need be. The last correspondent I had from FNB was that the phone will be delivered by the 7th of March 2018 and I'm still waiting. So that's my frustration to say the least.