What is going on with my billing MTN!?

I was called for an upgrade, initially said yes... A debicheck mandate appeared on my banking which I had a query about. MTN took long to respond and as such the mandate expired. I received an SMS saying my upgrade had failed and I should visit a store to choose a new upgrade.

I chose a different device on the MTN site. The WRONG (more expensive) device was delivered. I logged a query the moment I received the device. MTN took over a week to respond, during which time I was calling both MTN and CCI to try get this sorted out. I FINALLY had someone tell me I could take it back to the store as I hadn't even opened it but now the 7 days had passed and I would be liable for a cancelation fee. I told them this was unacceptable as MTN had taken over a week to respond to my emails and calls about having the wrong device delivered. They spoke to their supervisor and told me I would not pay a cancellation fee as long as I forwarded my initial query mail showing I had initiated contact on day 1. I did so.

My next bill was R208... Then R1000 and the one that has now arrived is over R600... for what SHOULD be a R200 a month contract according to the consultant I spoke to yesterday.

This is ridiculous now. I need my bill sorted out. I've logged a query (SR # ***) but this is dragging on and in the meantime I'm being billed EXCESSIVELY.

Please sort this out and refund the extra money charged for 1. the wrong contract and 2. the cancelation of said wrong contract. My normal monthly amount before the handset fee was settled was R398.