No LTE for 3-4 weeks

Good day. <br> <br> I live in parktown johannesburg, and I have noticed that I have not been able to pick up LTE on my iPhone for the last 3-4 weeks. I left the issue under the assumption that MTN may have had issues with the network, and hoped that they would be attending to it asap. Finally today I phoned MTN coverage and complained about the issue, only to hear that the consultant would log a complaint but there is no time frame that could be given as to when my problem would be addressed. So I ask the question, would I have to wait 2 weeks? A month? A year? I've already waited roughly 3 weeks. <br> <br> I would just like to know how long more I have to wait. I'm sure you can be empathetic, especially since the reason a took this premium handset with a good network like MTN was to be able to have access to LTE. I had checked the coverage before taking the phone, and it was perfect since I got the phone till about a month ago. So in essence, I have always picked up LTE in parktown, until a month ago. Since then, it has only been 3G. <br> <br> There is no issue with my phone as I pick up LTE in other areas. Just this weekend I was using LTE in durban for the entire weekend.