No customer service from MTN

I app**** online for a upgrade on 18 September 2022 to one of my cell phone contracts. I am an existing client and have been one for a long time. Up to today, I have heard nothing from this useless company. I tried phoning 135 but you hold on for an hour and only get recordings. You are not able to speak to an agent. Emails was sent to customer service. Same poor service. Message sent on Facebook. Same poor service. I will be cancelling all my contracts as it seems this company is not interested in my business. Customer service is just as bad as Rain