Need help with Vodacom

Vodacom has given me alot of problems from the beginning of 2020. I got charged bouncing fees on debits where I had money available in the account asked me to sent bank statement for proof which I did and nothing was rectified. I still had to pay those fees to openy network and get myself out of errors. Log a few disputes against them charging me these penalty fees until date no response. I then advance myself to prematurely closing the account as I did not want to still have a Vodacom account. I called consultants at Vodacom asking how to go about closing the account. I was told that I have to fill documents send from a Vodacom branch and pay the combined amount for both SIM cards however my account was not closed and now I'm being charged extra fees for months I already paid. Please help