What step to take agains Multichoice

I am back again with the same problem. In January i was complaining about multichoice. I app**** for router in October they delivered but did not activate it. Only activated on the 07th of December but it was not working i then asked them to come collect it as i am no longer interested, then on the 31 of December they promised to collect it which they never did. On the 24 of January I had to pay for what i was not using and i couldn't watch tv i paid about 300 for what i did not use then i wrote a complaint here on hello peter they contacted me, and arranged for collection it was on the 20 something of January the driver came collect and left now today they charged me again for that router which was collected i cant even what my tv they cant even connect me. I am tired of their incompetence and the level of stress this people can cause just so they can charge me with what i did not use. Please help what further steps can i take coz i have been sending correspondence since December and even today still struggling with same matter?