IS ENGLISH NOT THE LANGUAGE MEDIUM

It feels like I am talking a foreign language to the people at MTN. They have taken over the contracts from Nashua Mobile in October 2014. Since then, EVERY MONTH, my phone is disconnected!!!!! Then I have to call them, find out what is the problem, go to the shop, enquire, find out, only to wait another 3 -4 DAYS for my phone to be reconnected. I can not take this anymore. Charges are added to my account, interest are added to the outstanding. I would rather be phoneless than struggle every single month with some network subscriber who does not do their job!!! They are quick to disconnect your phone but reconnection is a disaster, although YOUR PHONE IS PAID AND NOT SUPPOSED TO BE DISCONNECTED. Frustration is not even an appropriate word!!!! It seems they don't understand the language I talk in and explain in. Is English not the preferred language that everyone understands??????