Vodacom refusing to close my contract!

I contacted Vodacom to close my account on the 13th Jan 2020, I spoke to several agents who didnt want to assist with closure, i think it's their Account Retentions Dept. I called again Thando From Upgrades and closure answered and helped with the premature settlement amount, I paid and send all required documents for closure, till today vodacom doesn't Want to close my account, I've been calling them since that day till now they tell me that their referring the account and opening or escalating my request.

Today I just found out that they used the credit balance for closure to settle my February bill, meaning I have to pay again the settlement amount.

When I thought I have seen it all today they added just added 180 on my bill so far and they saying it's for the old upgraded number, so my question to them was why do you charge me whiles I didn't get any airtime they say they will escalate for the line rental 210 to be removed. Vodacom is abusing us..

Can someone please help close my Vodacom account please!!!