Terrible service! Promises made not being kept!

I upgraded 22 March 2022.Was promised as with any upgrade to get 20gig data once off. I enquired after 48 hours as I were told this will be activated then. When I phoned to enquire were told to wait 7 to 14 days. After 14 days I phoned again, were told they are offline and unable to assist me. I phoned again after 2days, this time a call was logged of which I got a sms with query number. After 2 hours received sms to say query is closed however nothing was resolved. Phoned again the next day, again off line but lady who assisted me too down my details and said she will contact me back...guess what I got no call back!!!!! Ever since I have been phoning but get no luck as today again they were off line. I need assistance ASAP! Why do MTN promise and don't deliver. My number is *** should anyone ever feel to contact me resolve this. I am just fed up now with the service from MTN and to think I am with MTN for many years now. If this don't get resolved, I will not be upgrading ever again with MTN. I am very disappointed in the service I am receiving being a loyal client and paying account every month!