Complaint against telkom contracts and services

I've got two contract with telkom , one is ending on July this year and the other one I took it last year late October. The recent one have got two service sim card where I'm suppose to pay R245.00 a month but each and every month the bill is going up and I ask the agent who assisted me said my device need settings meaning I'm getting extra data when I ran out of the agreed one which is not part and parcel of my contract. In January one of sim card got suspended but R898.00 deducted in my account and second one got suspended too but the bill still more than the agreed one, even the old one ending in July is suspended last week. When I call them to terminate the contract refer me to telkom shop or online cancellation which doesn't work but they called me when they offered this contract