Worse Service ever from a ISP

I have had the absolute worse service with Supersonic ever. I signed up for Fibre with Supersonic via MTN at the end of July. I was approved on the 31ts of July. Two days later my fibre box was installed. There after I had to wait almost 3 weeks for my router to be delivered. My router was delivered on the 20th of August. I only was able to plug in my router on the 21st as I came home late on the 20th. My speed was only running at 5mb up and down and I signed up for 250 mb up and down. On the 22nd I decided to call them to sort out the speed of my line. While on the phone with them the internet went completely down. I battled with them on Facebook Messenger and Whatsapp for 2 days straight till the finally managed to send someone out. Only to find out that the cables in the area needed to be replaced. Multiple Metrofibre technicians come out to assist but no one rectified the situation. On the 2nd of September I was charged for a full month + pro rate even with my line being off for more than 2 weeks now. This is the worse service I have ever received from any ISP and I do not recommend them at all. My line is on atm but still running at 5mbs up and down and no one can tell me why. If my line isnt correct and running correctly by the 7th of September I will be reversing my Debit Order