Telkom Mobile

Thanks Hellopeter for always helping us. I have big issues with Telkom mobile contract.i have contract with Telkom for paying R189.00 monthly but they send me different bill which is R879 which I don't know where is from.this is the only contract i have with them ***. the phone they send by mistake yo me on November they took it back .but they always include in my bill. Please Hellopeter intervene