MTN your service sucks!

I am beyond frustrated with these ppl!. What kind of people do they have working in their customer service. I sent and email a month ago ( only because i am not getting any joy talking to them on the phone!) asking why is an OTP for an upgrade going to a secondary line on my contract instead of to me as the main account holder. First they kept on insisting that I am the main account holder so no1 knows why the OTP is going to my son's phone1. Then after having to follow up i get an email saying it has been escalated. Now a month later I get this email:

Thank you for your email. Please find feedback below: Kindly note that the primary number is laoded as ***x (my number) however the OTP when upgrading goes to ***x ( my sons number).

Like ***!! that's the reason why i emailed you guys a month ago!!! WHY!!! so now i'm forced to respond with another email asking Y!!!!! how can an OTP for an upgrade that i am paying for go to another number?

And guess the response i get... we have escalated your query...

ai.

i have no words...