MTN BAD CUSTOMER SERVICE

I have been trying to upgrade from 27/08/2023, My credit must be increased..I then phoned the *** number on 30/08/2023 and spoke to a lady Charlene from the credit department and she said that she requested for my credit to be increased ,it will take 24hours..Nothing happened,I phoned on the 31/08/2023 again I was told to send an email to request a credit increase, I was told that will take another 24hours. On the 01/09/2023 I phoned again and my query have not been openend yet..Today is the 2nd of Septmeber 2023 and Im still waiting...I have been a customer for many years and never battled if I had to upgrade...MTN's customer service is very bad if this is not solve I will cancel my contract and will never use MTN again.