Blatant lies, false information and *****ulent business practices

I was contacted by these people on 4 May (Truecaller shows them as "Vodacom Upgrades" which appears NOT to be the case) and after a very long conversation with the agent we'd reworked my upgrades and adjusted a few things the result of which, I was assured several times would total R1,133 per month, a net savings for me which is the ONLY reason I agreed to these changes (again under the impression that I was dealing with a competent individual). I stated multiple times, ion a supposedly recorded conversation, that I wasn't able to pay more than my current bill of R1,400 and was assured this would be a savings.

Cut to my Vodacom bill today and the total R2,275!!! Oh and you can't call but "you can write to them via their website" (which doesn't work, it's just a blank page) and a representative will call you back. Right Can anyone explain how I should do that given their site doesn't exist??