Pathetic service provider ever

To Whom it may concern,

Since day 1 I have had problems with my LTE and phoned vodacom since I've had it. They don't do anything to fix the problem. And asked for cancelation if it can't be solved. I'm fed up with this, they bill me each month for something I can't even use. I want to stop this contract and stop them from taking my money each month. I want to change to a better service provider.