Migration nightmare

In June I cancelled my service with MWEB because after many tickets logged over the past 2 years, they never seemed to solve my connection problem. I then decided to leave MWEB and go to another ISP. I cancelled in June 2024 which made July 2024 my notice month. On 1 August 2024 i got cut off (obviously) and expected my new ISP to connect my internet. Till today Afrihost(new ISP) is telling me MWEB never released my line and they cannot activate my connection. I contacted MWEB many times, struggling to get through to them everytime just for them to tell me they have released my line but Afrihost is telling me a different story. Vumatel has no way of making contact with them because surely if MWEB says they released the line and Afrihost says the line isnt released, the hold up has to be the middleman which is Vumatel. I dont know why it takes this long just to open my line to Afrihost