The worst service provider.

I had a 2 year contract with them and their service was good. I then extend the contract for another two years. The first year every thing was going smooth and whenever I had problem they will attend to it immediately But now they are showing me flames. For two months without internet ,when I call them they promise that they will attend the matter or they will call me. They take my money but no data. They even blocked my Sim card 😫😫