Afrihost refuses to release my fibre line.

I cancelled with Afrihost on the 17th of August as I wanted to move to a new ISP with cheaper prices. As I cancelled I was given an option for a free month with Afrihost at no additional cost - I declined. Even though I declined this option they still gave me the month extra. Now this obviously delayed my switching over. Come the end of September my Afrihost internet finally "switches off" but my new ISP state that they cannot complete the transfer because Afrihost is still occupying the fibre line. A month and a half after I cancelled my afrihost fibre account I still cannot switch over to my new ISP because afrihost still has not "released" my line.

This is becoming increasingly frustrating as I run two businesses from home.