Bad service and failure to meet agreement

I have been an MTN customer for more than 5 years. Last year around September my services were disconnected due to non-payment and a confusion around a credit that was due to me for upgrading my contract. Payment of my account was brought up to date on 02 March 2015 after MTN uploaded my credit accordingly. <br> When I checked my Account data and aritime balance, I found that the months when I was disconnected was not reflecting. I then called MTN and was told that I will be credited for only the last 6 months from current date (not the entire duration I paid for when I was disconnected) on the 21st of April (my account is reloaded on the 21st of each month). On the 21st I checked my credit balance and realised that the credit I had not used in the last 6 months was still not loaded under my account. I then called MTN again and my call was taken by Martha Phatsone (call reference number = ***), she told me that I was not going to get my data and airtime for the months I was disconnected. But the truth is I have paid MTN for those months. I worked hard to bring my account up to date. she told me that if I had paid my account I wouldn't be in this situation. She was rude and did n