No service

I recently have been having a problem with my samsung phone on a top up contract. My data and airtime has just been running out and simultaneously my battery has started to last only a few hours. My phone doesn't connect properly to wifi either. I've turned off most of my apps and on the data usage it's my android os that seems to be the problem. None of the call centre operators were able to help telling me that I cannot hand my phone in for repairs due to the strike!!! None of them could tell me which centers were not on strike and I was told to find this out for myself. Several calls later I had been transferred from 1 department to the other with the call either being cut or finding myself with an operator with bad attitude who wouldn't help. I am sick and tired of Mtn 's poor service, I am a medical doctor and require a working phone all the time. My phone has been dysfunctional for the last month and nothing can be done about it!!!!!!