Forcefully replaced ADSL router with a LTE router. No internet access for 3 weeks now!!

I was very happy with the ADSL line I was offered by telkom, and it worked very well for a while, until I was contacted by Telkom, saying that they are getting rid of the copper cables, and I need to get a LTE wireless router. It's been 3 weeks now without internet, and they keep on telling me that they have a problem on their side with my account being "active", and they need to solve that first, and then they can assist me with the router. The worst service I ever experienced from a big company like Telkom. They keep on promising me that they will get someone to phone be back to resolve my crisis. Now they tell me that I will have to wait another 7 days for this problem te be resolved. I am sure there must be someone that can press a button to close my "active" account, and solve the problem.