what a bad service , even the Twitter person is not helpful to escalate the query!!

How long does it take for Vodacom to respond to my emails as I want them to confirm in writing that whatever account opened with my bank account is closed. There's someone who phoned me 2 weeks back and I've requested him to let the accounts team send me an email in writing that indeed the account is closed. Vodacom is deducting my account monthly and I don't have services with them. I am shocked at how poor this query has been handled. I am so disgusted and I want to puke!!! A simple email is what I am asking , is that too much to ask???? That's your silly reference : EC-1M7H-1NXGR0