Costly delays by Autopage

My phone uses airtime instead of data. I queried the issue with Autopage and they logged a call with MTN and confirmed that my phone is fixed. Within a couple of hours the phone started again, I went back to Autopage in Carnival mall within a week to have my phone fixed, they logged a call with MTN again and told me they will get back to me. Its been over a week and I haven't heard anything from them, and over 3 weeks I have been querying this issue with them. Now I can't buy airtime because it gets consumed quickly and that costs me a lot.