Most difficult upgrade with them EVER

My number is due for a upgrade .i contacted mtn direct call center to do upgrade and was assisted by inbound sales agent JOHAN JANSE VAN NIEWENHUIZEN. I have endless problems trying to get hold of this guy to find out what is happening as he advised his sending a request through for a manual limit increase. I was told by him 1st he had a system error then and email to say he was dealing with queries till 8 the evening bare in mind their contact center closes at 5 everytime is something else. Today 11/02/22 i spoke to his colleague GRANNY MAFIKANE also in his department and was told we are on a waiting list for the phone we wanted and the credit limit increase was done . When i spoke to him he advised there was stock of the phone and we would get it in 5-7 business days after he the limit review was done. I asked to speak to a manager today because JOHAN is giving me the client a run around .I am disgusted with the sevice i was told he will call me the next day came the next day i called he mailed his going to call the following day up till now nothing yet. So today 11/02/22 his colleague advised he logged off already bare in mind this is before 5 . So he forgot about me whos been calling whole week trying to find out what going on regarding the upgrade i want to do. I feel that MTN itself the service is pathetic i just feel like cancelling everything and moving to another service provider!!!! i need answers!