Absolutely Terrible Service from Vodacom

I have been struggling for the past 6 days now, with various calls, visits to Vodacom and App chats, to get Vodacom to cancel the following contract. I eventually received the advice (via a App chat today) to submit this message to this email address; *** but this comes back with an error...

I requested (online and someone then called me) for your 10+10GB Data Contract for R149 per month. This was finalised last week Saturday (30 Nov 2019). Due to Vodacom then also changing my current (pay-as-you-go) arrangement to a contract with CLIP to be paid for in addition, I decided to cancel the contract and requested such on Sunday (01 Dec 2019) – not 24 hours later than the confirmation of the data contract. I have since then been struggling to get the contract cancelled!

Most of the Vodacom employees I engaged told me that they do not provide reference numbers but I got one from a person who I chatted with via the Vodacom App. The reference number SMS’ed to me is ***.

All I want is to cancel the contract ASAP well within the allowed 14 days. This matter is not allowing me to purchase anything from Vodacom (airtime, data, etc.) and I can also not see who is contacting me!