Unqualified Personal- Wrong Information!!

I received an sms saying that my spend limit is going to be increased, i should reply yes or no to accept or decline. However i could respond as my contract doesnt have sms's and my line is capped, so i called the call center to let them know that i don't want to increase my spend limit. The consultant advised me that if i if i don't respond to the sms no changes will be made on my account, a day later a get an sms saying my limit has been increased!!! when i called in again they tell me the change was made because i didn't reply and i can only decrease my limit in a months time, apparently i could have rep**** because the sms is free. NO I HAVE TO CALL IN AGAIN TO MAKE CHANGES I DIDN'T ASK FOR!! PATHETIC SERVICE! Whats the point of putting a limit if telkom decides to change it on its own and for their consultants to give incorrect information!!!!!