Poor service

I have had endless issues with afrihost the last few months, I have been a customer since 2015 never had these issues. I had a 20mbps capped 300gb adsl line and in March I decided to change to pure dsl 20mbps vdsl line. I have been having endless issues since I changed the telkom line works perfectly. I even queried about a refund a few times as my line never worked properly in a full month since January and I always called and complained about it. Speed issues have always been been a problem for me. I have been calling on numerous occasions trying to get my new pure dsl line working but nobody seems to be assisting they all say that they logging a request and never seem to get back to me it has now gone over 2 weeks. This morning I get a sms from my bank showing almost double the normal amount. Turns out I have been billed for both lines yet I am still using the old line. The new one has even worked as yet. I await a response and a solution as I can't keep going on like this. I keep purchasing mobile data to use and it costs me R100 for 1gb this is crazy when a small issue can be sorted out and it will work fine.