Terrible Experience from Mondo (through Vodacom)

I noticed a duplicate charge on my Vodacom bill which i queried with them. I was eventually told to contact Mondo myself (a company i don't even know) as I had signed up to a contract with them that I had to cancel myself.

I was magically signed up for a new contract via telephonic sales apparently. I have never agreed to anything and now trying to cancel it I have been going backwards and forwards with them 5+ hours on the phone during the course of 2 weeks.

They said they would "review" the recordings of the phone call. That was on the 11/11/2019 its now the 25/11/2019. After eventually getting through to someone with access to some old M2 system I've now been told sorry they will escalate my case and get back to me by the end of 26/11/2019.

How can such shady business practices be allowed in 2019 ?