Vodacom not cancelling accounts

Not too impressed with Vodacom... I have canecelled about 8 business accounts with Vodacom, as the numbers are not being used. (06 May 2019) In November 2019, i was informed that Vodacom still HAS NOT cancelled these numbers, because apparently "they never received the cancellation". Then your call centre is asking me for a reference number (which i never received from anyone) to confirm the cancellation. I have the proof of the sent email in my outbox stating the exact time and date this cancellation was sent through! All comes down to Vodacom *****ING MONEY for 6 months! I definately wont recommend their services.