MWEB Tech Support is AWFUL

Had problems with my internet connection on Friday, 22 July 2021, and called Tech support. Had such bad service that I asked to speak to a supervisor and was threatened by the tech agent that he would drop the call if I continue to ask for a supervisor. Not even to mention how extremely rude, arrogant and insulting he was, so that I dropped the call and when I called again asking for a supervisor, I was assisted, the problem was NOT fixed and I still have not spoken to a supervisor or manager. After being a loyal customer for more than 8 years now, I find this EXTREMELY UNACCEPTABLE. Where can we as customers complain to about bad service or must we just make due and c'est la vie?