Mondo and Vodacom lie about their contracts and overcharge

I called Mondo last week complaining about incorrect billing and contract they've put me in without my consent. I requested audio conversation which was promised would be provided within 3 working days. Fezile still hasn't contacted me a week later and I've been informed my case was closed. I wasn't contacted/informed and now have to go into Vodacom and call from there to listen to my conversation. The customer service is shocking and Mondo are ******* who lie. For 2 months I haven't received and invoice from Vodacom which I normally do. Now the 14 day cancellation window has conveniently lapsed.