Poor Managed Edgars systems and service

I took out a cellphone insurance with Edgars over 5yrs ago. In Feb 2020 my phone got damaged and I had to take it in for repairs. To my surprise i was told that the system discontinued my insurance in Sept 2018. No one picked up this error on Edgars side nor did they care to inform me of such as I never cancelled on my side. I have been paying my account monthly and never have i ever skipped a payment on this account. Now that I am in need of the services that I have been paying for, I am informed that they will have to back debit me for R2300 that they have missed in the past 1 and a half years. I fail to express the level of disappointment I feel with this store and i will discontinue all my dealings with this store and I want my cellphone repaired. I will not pay anything more than what i have already paid. I need this matter resolved as it is not my fault that you use outdated non-functioning systems.

PS: IF I WAS THE ONE SKIPPING PAYMENTS, MY ACCOUNT WOULD HAVE BEEN HANDED OVER, I WILL ALSO TAKE LEGAL STEPS SHOULD I NOT GET THE SERVICES THAT I HAVE BEEN UNDER THE IMPRESSION THAT I'M PAYING FOR.