MTN customer service losing MTN clients

I can't explain how frustrated I am with MTN customer service...I phoned the 135 Client service number after receiving multiple Y'ellow messages to confirm a subscription I know nothing about. After first speaking to Mbali for 42 min (holding on to speak to her floor manager Khumalo Rokosa) after stating that I just needed to know how to cancel a subscription via their MTN app. She asked for me to confirm my ID number but when I said that they can ask me other security questions because I am not willing to give out my ID number she put me on hold when asked to speak to her manager. After 42 minutes the phone was put down on her side. I then phoned again and spoke to another lady who again asked the security questions and when I again refused due to security concerns I asked just for a conversation with a person to help me do it myself on their app which apparently is impossible. You apparently can't speak to any person at MTN without going through a security check...not even when you just want information on their app....they apparently have never heard of a conversation...their customer service consultants will with that attitude have little customers left! Will just have to Google how to cancel subscriptions!