All promises and no action - double deduction for no additional benefit

In 2020 I upgraded my Vodacom data bundle through Elite Mobile, as agent for Vodacom. Since then, I have been paying both Vodacom and Elite Mobile for the same data. When I escalated this to both companies, I received assurances that the debit order would be cancelled and the funds previously deducted, refunded. On checking my bank statements for September 2021, I noted that no refund was made and the debit order continues being deducted from my account.