Not releasing the Fibre line as promised.

I am not a client with Supersonic and after my experience today I never will be. I moved into a new place this past weekend and the previous tenant canceled their contract for their Fibre line effective 31 July 2021. I am now trying to get my own line activated but Supersonic has never released the line! Nobody responds on their WhatsApp number. I held for 30 minutes just for them to answer and another 20 for them to tell me they will only release the line tonight. I am now holding for another 15 minutes so far because I told them that is unacceptable. My ISP can't process my order until they release the line. I can't do this again tomorrow.