Contact issued incorrectly then cancelled

I had a Vodacom contract for 20 years. Temporarily converted to prepaid. Then ordered two phones online with the request that our prepaid numbers be used because it is a business phone. When we activated the phones the numbers were incorrect. After weeks and countless calls via the call centre, we were finally told that because the contacts were activated with the other numbers, this can only be changed in 6 months. I then indicated that in that case they should cancel the contract and they indicated that the phones will be collected in 5 to 7 working days. The next day I called again to confirm that the contracts had been cancelled and they again confirmed that it would be collected. That is now more than three weeks ago. The phones had not been collected, the contracts had not been cancelled and they keep deducting funds from my debit order. When we spoke to Vodacom cancellations they indicated that the contact was in fact via a third party, and that we had to call them. It was the first time that I became aware of that, and would not have dealt with them if I had known. I need the contract cancelled and funds repaid!