Poorest service ever

I received a phone Valle from a telkom mobile official and agreed to a contract that entitled a modem. When the device came, I found out it was a tablet and not a router or modem as agreed. I immediately phoned them within the 7 day cool oof period and made it clear I received an item I don't want and that they should come and collect they're item back cause I don't want what they've sent me. I made a second call withing the 7 day cool off period and stressed the fact that I didn't receive the item agreed Avon and don't want the item they sent me. I asked them to do an immediate cancellation as to prevent any inconvenience of billing me for an item I don't want. 3 months down the line, my bank accounts gets debited a R1300.00 <br> I immediately went in an reversed the debit order from my bank and have ever since made countless calls to sort out this issue regarding a mistake they made on they're side. When ever I phone, I wait literally for hours for a response and when I do get through, I get put on hold form one person to the next until my air time runs out or I just simply get cut off. Is there anyone that can help me with this issue?