Mtn attempt to cancel contract in cooling off period

I took out a Contract on black Friday, online with MTN for an OPPO reno 7 5g. The device was delivered to me the next Wednesday with DSV couriers who botched up the delivery badly as well. They sent an agent whose device did not work, so he could not capture my fingerprints etc, after spending almost 30 min in my home trying to charge up his device. Anyway after receiving my device, I saw that the watch which was advertised as part of the promo was not with. I immediately tried to call MTN, emailed as well etc. With no luck. I then decided that I am not happy with the phone, and immediately tried again to call and log a cancelation in the cooling off period. I did not have any luck as I ws transferred from one dep to another with no one assisting me. I emailed a few times. I just got the automated response. I tried cling, emailing, on Thursday and Friday and Saturday. No response besides the standard automatic response.

This morning I tried again, after spending almost 45 min on call with them, transferring from one dep to another, still I have no luck. One customer service consultant by the name of Andrew (when I asked his surname he said Tate, which make me think that it's a racial issue, because Andrew tate recently converted to Islam) just refused to assist me, and cut my call when I asked to speak to a consultant. This is very frustrating. MTN has the worst service by far.