Vodacom Handset Insurance Refund

In June 2020 Vodacom advised that the handset cover would increase from about R30 per month to R360 p.m. I immediately contacted them and advised them to cancel as I was not willing to pay 10x more. Since June 202 I have had dozens of calls with the call centre and many e-mails asking them to refund me the charges that they continued to raise on my account. Today, 15 April 2021 this is still not resolved. They still owe me money that they have taken post ,y cancellation. Requests to escalate and/or be provided with a manager/director name/email/phone number have all fallen on deaf ears. Vodacom have no regard whatsoever for service delivery as long as they have your money nothing else seems to matter. I am disgusted by the lack of action when I as a pensioner need this money to survive. Any of you out there be aware that getting money refunded is worse than anything I have ever experienced in any of my dealings with a large corporation. Once they can deduct money out of your account via debit order they just ignore you and don't care.