Extremely poor service from Vodacom

My co tract expired on the 19th of December 2019. I phoned the cancellation department on the 1st of december 2019. Cancellation was lodged and the effective date was supposed to be the 31 December 2019. On the first i checked and nothing was done. I phoned on the 2nd of January 2020 and was informed that the cancellation was not processed. So i asked for an immediate cancellation to be done, i was told it will be done before the end of business on the 2nd of January. At 17:00 i phoned again as i havent received a confirmation sms of the cancellation. The agent told me they are unable to perform a immediate cancellation as im still on an old system the. The phone was put down in my ear. I phoned again i was just put on hold. All 3 times i phones i was not given a referance number, the agent told me everytime i asked for it that it would be sms'd to me.