Powerflex cancellation issues - impossible to cancel and no help from Vodacom

I've been trying to cancel my Powerflex plan to go back onto prepaid and upgrade to a higher plan but it's impossible. There is no option via the Vodapay app, Tobi doesn't have the option as part of it's menu, if you call or email, you're directed back to Tobi.

This is a violation of consumer rights and false advertising. I've documented my attempts and if it's not resolved within the coming week, I am lodging a complaint with the ombud.