Phone stolen. Consultant did not activate the insurance premium and claim to replace phone is reject - Consumer Complaint for Vodacom - Head Office

I took out a contract a year ago with a Vodacom shop in Cresta which has since closed down. In the contract, I signed for and took out insurance but the dealer and manager did not send it through to insurance to activate the premium debit. As my invoices reflect an insurance cover I unwittingly assumed I was paying for insurance.

Last week the phone was stolen. I went to another Vodacom shop in Cresta who refused to help me and my claim is denied. I agreed to back-pay the amount but the insurance company passed me back to Vodacom and said they must sort this out as I should have realized that I wasn’t paying an insurance premium. Vodacom is saying that the shop where I bought the phone is franchise owned and not company owned and there is nothing they can do. I have since tracked down the dealer who was negligent- he is working at a Vodacom shop in Westgate. He admitted that between him and his ex manager they were st fault but he thinks that insurance won’t accept my claim.

Is this not breach of contract from Vodacom’s side. A consultant at Cresta said that I do have the right to claim as it was negligence on the part of Vodacom and if I back pay the insurance it should be sorted. I need therefore he said, to contact head office?
Please advise.