Unable to cancel data bundle, not honoring special

This is most useless cellular company is South Africa. When I wanted to make my data more, it was real easy! now I have to spend 10 min on the phone to find out they are not honouring the contract they made me signed. <br> <br> When I renewed my contract I got 700mb a month, now the I heard it only 200mb. I CANNOT WAIT TO GET RID OF THIS USELESS CONTRACT!!!<br> <br> If ANYBODY wants to sign a contract with them, BE WARNED!!!