Worst accounting and service ever

They have been over charging me for 18 months now. They owe me R 4 428.00. I contacted them to yell them this and have my account corrected. They have now increased my monthly payment amount instead of reducing it and sent me an account station I am in arrears of R3 295.65... I have spent over 3 hours listing to on hold music. If I try the account, tech support or sales all I get is on hold music for hours. Email has resulted in me get a sorry excuse for a statement and no resolution on the over charging they have been doing for over a year now. There whatsapp given only this answer no matter what option you select "We're aware of connectivity issues due to damage to the WACS and ACE International cables, along with a worldwide Microsoft Azure outage. You may experience slow speeds and intermittent connections, as well as difficulty accessing Microsoft apps."

I can not get hold of a person at all. This is the worst service ever and they just don't care. Money making ****.