Telkom contract is a waste if time!!!!!

I sign up for a contract with Telkom, first month they prorata and don’t deduct the amount, mid month of the second month.. way before the deduction date they cut my service due to reaching the credit limit. A credit limit I was never made aware of. I wasn’t warned I had to made a payment before they deduct. Now I’m stuck here, they don’t want to deduct the entire amount or even an amount that brings me below their credit limit. I have a hectic weekend planned and need access to minutes and data which are cut off without a warning!!! Now I must make a manual payment then wait 24 Hours minimum before they resume my service!! 24 hours with no access to internet or my minutes that I agreed I’ll pay for but have now been cut!