Have no Internet coverage when I am at home.

I live in Queensburgh Durban Kwa Zulu Natal. We had a thunderstorm on Tuesday 02-02-2016 round 21h30. Ever since then I have had no Internet coverage like i used to on my cellular phone. I can receive calls and make calls as well as SMS. No Internet coverage at all when I am at home. As soon as I move out the area Internet works perfectly fine. I regularly use Internet for personal communications especially now that I'm looking for work abroad. My financial adviser came to see me at home on the 4th of February and he also had no Internet access I tried to complain to the mtn complaints division on their website but that does not seem to work. So I'm hoping that they can sort the problem out soon. As I have never had a problem with mtn service for the past 15 years that I have been a Mtn customer.