MTN Internal ***** and Blocking me to speak to them

I got an upgrade on my account 5 weeks ago. MTN delivered the wrong device during lockdown, arranged to pick it up which they did through DSV.

Now 5 weeks later they are debiting my account yet I have no device at hand. The 135 number does not get any response and when I get to retentions through the *** number they cannot trace what happened.

My account is being charged based on what looks like internal ***** and yet no one at MTN South Africa can help me.

The email customer service which supposedly responds in 24 hours has yielded no result.

I am stuck and yet MTN South Africa are profiting from me.