Worst service ever from wi fi service provider

Good day. I saw that Cool Ideas is one of the sponsors of Carte Blan he. They ****** me for approximately a year by charging me for 200 MB up and 200 MB down, while they admitted on only providing 100 MB up and 100 MB down. Every now and then I had zero internet for 2 weeks or more, while they assured me that everything was fine on their side. I begged them to send out a technician, but they said that the company doesn't have a technician. How is that even possible or acceptable??? I asked them to get a contract technician. I begged for help, but it seems that they have a lot of employees sitting behind there desks, sending me e-mails thanking me for my patience and that they have escalating the problem (for the past year) - whatever that means. Nothing happened to solve my problem. I told them to stop sending me "love letters" and thanking me for my patiece, because I had zero patience left and tat they should get off their chairs and come and fix the problem. I told them that the I thought that the router was struck by lightning. The one employee suggested on the Fridaday before, either xmas or New Year's at approximately 15:30, that I should drive through to their head office (think in Rosebank) that I should drive through to fetch a new router. I could not believe the odasity of even requesting that! I stay in Hartbee****rt. I received the new router a week later. It worked for a few days, however, we cannot watch Netflix or YouTube on our smart TV's. Our businesses have suffered financial damages during the past year due to their incompetency and I am paying for Netflix, not being able to watch it. I need them to refund me, but on that request they did never responded. I want a full refund of all the money I have paid them so far. They have delivered the worst service I have ever experienced from any business so far. I gave them a written month's notice to cancel their (no) service. They sent me a notice that my (limited to none) internet would be stopped by 20 January, even though I paid for the full month of January. Please help. I want my money back. What should I do next?