Poor service from Vodacom

I have been calling Vodacom for about 3 months to get clarity on my cellphone bill which as jumped substantially. After numerous calls Vodacom is unable to assist. When I asked if my call can be escalated I was told that their management doesn't deal with such complaints. During this time of covid-19 Vodacom is adding unexplained changes to loyal customers accounts to try and cover their losses. I was then asked by agents when last did I pay my account as they cant explain so now they turn it n me. Every unsettling as all their information should be infront of them. Also to accuse me of not making payments because they cant explain why they're charging me obscure amounts is concerning. Very disappointed in Vodacom for their pathetic services.