What happened to my limit, free sms's and free Telkom-Telkom calls?

I received my Telkom bill for April, which will be paid at the end of May. This bill is R30 more than previous months. I had a look as to why it was more and I see that there are extra charges for calls to Telkom numbers, calls to other SA numbers and charges for SMS's sent. I do not understand why, because according to my plan, I get free SMS's and calls to Telkom numbers are free up to a point. However, I also had a R1.00 limit set on my account, which means that if I phone someone who is not Telkom, then the call should be cut off when it exceeds R1.00. If this limit has suddenly disappeared, then that is Telkom's fault. It is on record that I requested a R1.00, because I do not know if a number I phone is a Telkom number or not. I NEVER agreed to a R500 limit on my account.