Ni internet access in Lady Frere

I am so frustrated with the MTN network here in Lady Frere, Eastern Cape. It has been two weeks now not being able to get internet access. When I first got my router, it was working very well and it was fast I was actually pleased. I do not know what changed as I am still receiving a 4G signal whether I have the sim card in my phone or router but there is just no internet connection. I have tried restarting these devices, taking the sim card out, even using a 3G signal but it has not helped. The key conundrum I am facing is that I am heavily dependent on an internet connection to carry out my work duties and the 100GB monthly I am paying for with MTN are just sitting there with me not being able to use them while I have to spend exorbitant amounts of money buying data elsewhere to get my work done. I had to buy data to make this very complaint. This is very unfair and MTN must understand me, I am not looking for an apology. I need a practical solution that will assist me in my situation. Its either you credit back the money I am paying until you solve your issues so I can use it to buy data with another internet service provider or you address your problems quickly. I am really fed up and I cant take it anymore. Its not fair that your issues are costing me while my data which I have paid for expires simply because I am not able to use it despite having a 4G signal