WITHOUT INTERNET SERVICE FOR A WEEK, NO CONTACT FROM OPENSERVE AND UNABLE TO CONTACT THEM

I reported my fibre box problem to Supersonic on 26/04/2022 and was told that Openserve will call me back to attend to the problem, which have not happened to date. I followed up with Supersonic again today and received Openserve support number 3BRK250422 to see if I'm able to sort this out myself. I am working from home and can not afford to be without internet for over a week now. Openserve only has *** as a contact number and you don't get an answer on that number. I also reported via the chatbot. Tried calling *** (Telkom) as well and was told that I can only contact Openserve via the *** number or via the chatbox info email. How do you resolve problems if the service provider can not be contacted?