MTN Cancellations

MTN Cancellations I requested a cancellation 7 days into the contract and I was advised by the consultant that I had 10 to cancel a contract with out paying cancellation fees. I called the contract department requesting cancellation and was advise that the cooling off period has expired and that it was 5 days not 10 as advised by the consultant. I got My router on the 13 November 2020, I used it one on my phone because the data is not available and I have been calling the retention department for almost three weeks with no one picking up and there were few times where the phone was just dropped with out anyone answering, now I have R700 bill for one day use. Even the store couldn't help with both the error on the SIM card or cancellation, I was told that I have to call the retention department and I advised the lady that I have been doing so and that the phone either does not get picked up or get a dropped and he said it's free so I'm not using my airtime. How is it so easy to get a contract yet so hard to cancel and there is no assistance whatsoever.