Mobile data not working for 5 days, and no one at MTN can help me.

For the past 5 days or so, my mobile data has been extremely erratic on my iPhone. 90% of apps that require data are not working unless I am on a Wi-Fi connection. Both at home and at work, I see that I have 5G (and sometimes LTE), as well as 4 or 5 bars of signal strength, but most of the time, I cannot send/receive whatsapp messages, open websites on my web browsers, stream movies on Netflix or YouTube, stream audiobooks or music, etc. Occasionally some apps work for a bit, but 90% of the time, nothing works. I phoned MTN and after waiting for about 20 minutes I got cut off. I phoned again, and the person who helped me said everything seemed fine with my account, but he would transfer me to the technical department, at which point I got cut off. I phoned again the next day, and the lady who helped me said it looked like I don't have "general data" - I only have "work from home" data, social media data, and movie data. She said she would transfer me to the customer department, but she transferred me to the wrong number. No one seems to know why my mobile data suddenly stopped working for the past 5 days. I've been an MTN client for over 15 years. I haven't changed any settings on my phone. I haven't upgraded or changed MTN accounts. I've done nothing. I did try resetting my iPhone to factory defaults, but it didn't help. Somebody please help me. I can make calls. The problem is my mobile data (when on Wi-Fi, everything works perfectly). Thanks

My billing account is BA*** my cell number is ***