Useless Telkom data contract

I bought a 10 gig a month contract early in May. I had internet for the first day and there after only sometimes. Every time that i open something that uses data, I receive a sms stating that my internet has been paused because i am using out of bundle data, even in the in the beginning of the month when i received 10 gig. I have received a whopping 140 sms`e from 11th of may until now stating my internet has been paused. I did contact Telkom`s help line only to be put on hold for hours, Thats not an option any more as I am getting charged by another service provider I have sent numerous e mails through Telkom`s web site, but no response. I went to Telkom`s office in Richardsbay, they couldn`t help me because they are,according to them, not technicians. I was told that I can cancel the contract but will have to pay the whole 24 months, there for, that is not an option. I don`t what to do now, I am paying for a service i don`t have, i cannot cancel it and if I stop paying my name will be black listed. I don`t have internet at all on certains days. I will appreciate some help or advice from somebody else who is having a similar problem