MTN is the worst service provider I have ever dealt with!

I do not know what is going on at MTN but clearly you guys don’t listen to your customers’ complaints. I have a Samsung S20 Ultra on the following account number: Billing account BA***. Normal account total is about R1,401.03. That is fine, leave it as is. BUT: Lesley from Rewards Co called me one day with a special on a Mecer Smart 14" Celeron 4GB, 128GB laptop, with router for R199pm. I accepted however as soon as I received the laptop I tested it and it froze on the startup screen. The day after I received it I immediately called to cancel it and to arrange for collection. I was told to go to ANY MTN store but MTN Atterbury didn't want to assist me. Finally after a huge fight DSV came to collect it on 10/02/2022. (see attached - M777WR136A***0DE1). As soon as it was collected I called *** to cancel the contract as instructed. I spoke to Sunasha who said that it will be cancelled. I then received an invoice and R1,828.44 was deducted on my account – meaning that I still paid the amount for the laptop and router AFTER I CANCELLED IT! (see attached invoice I***). As I cancelled the contract the day after receiving the device I demand to be refunded. (bank details below). This morning I received an SMS saying: : “You are now on a prepaid contract. We’re giving you R10 airtime to get you on your way.” What the hell? Sort out this **** immediately or I will escalate this to Beeld and ICASA!!! My contract for the Samsung S20 Ultra is still valid until October. Leave it like that. But cancel the one for the laptop and router and refund me. How difficult can it be???!!!