Telkom Mobile

Telkom Mobile has decided to increase my spend limit without notifying me. I have a smart plan 100 contract with Telkom Mobile. On Saturday morning, I received a sms to say that my spend limit was being increased to R350. I was not notified about this and when contacting the call centre, I was told that i have to go on to the website and decrease the spend limit to what it was. The explanation that I got was that Telkom made a business decision to increase this spend limit. None of my questions or concerns could be addressed. I was also told that I will be liable to pay for this extra R350 if any of it is used. What I would like to know is why does Telkom Mobile make a decision without informing me as the account holder and why does Telkom expect me to do there work for them. I did not put the extra R350 on my account but I am expected to remove it. This situation really baffles me and I seriously regret taking out a contract with Telkom Mobile because it has been nothing but problems. I am now in the process of trying to remove but I cant do to technical errors on Telkoms webpage