Disgusted & disappointed

I hereby express my disgust in services I have received with MTN. my contract was due for renewal in march of which I did. now the interesting part is that I was never told there will be changes, such as airtime, data and sms limits. To my surprise I was suspended and was told I reached the limit and that I will pay 300 more that what I my contact billing is, the girl who was explaining this to me also traced that the reason fot this is because I never received my mega bites and smses as it is in my contract, asked me to contact them on the 22 of May