Mondo and Vodacom - unwilling to help resolve upgrade dispute

Dear Team

I hope someone can help me last year 15 April a customer service agent phoned me from Mondo to upgrade my vodacom account. I declined the request however they went ahead and upgraded the account in any case. On the 17 April I raised a dispute though email to *** however they never returned my email. I tried to phone the customer care line *** without success. I would like the upgrades to be reversed as I never requested the upgraded. The two ref numbers I have are *** ***

I did raise it with Vodacom as well however they are unable to assist because it was mondo. It is clear that Vodacom can not manage their third parties.