Poor sales and after sales service from MTN Direct.

I upgraded my data contract that expired 10 October 2019. I took a deal with two devices that was advertised for R 399.00 Including VAT. I received the devices on the 30 September 2019. On the 15.10.2019 I called them. They informed me that my account is R 821.33 including recurring data of 5 GB. I told them I don't agree with this. They issued me a reference number ***. I called them again and asked why was the deal advertised with both devices storage of 128GB and the 1 device only has 32GB storage. The sales department told me I can cancel the deal and they will charge me cancellation fees. They send a sms that my inquiry was resolved. When I called today to confirm the amount was different. I asked for my subscription agreement. It was emailed to me and the contract is for the dual device deals for over R 800.00. I emailed this to a service assistant and had no reply. The consultants I spoke to from Monday will not even take the initiative to transfer you to the correct department. I spoke to 3 different departments to solve this problem. Unfortunately I still did not get the correct information from them. I have to escalate my matter.