Very Unhappy Client

I did an upgrade last year and instructed the salesman to make sure the device is insured due to my previous experiences where my device was ******, - The unthinkable has now happened and my LG Q60 was ******. I went in store just to be informed 'sorry it is not insured'!!!!! I have requested the original documents that I signed so that I can check what the salesman did and Why he never loaded it on my contract. The lady at the store said she sent an email to the back office for some to contact me - Guess what no one has! When I called earlier - there was no manager to speak to and yet again "someone will call me back"!! I have been a client of Cell C's for a long time and this has just left rethinking my association with CellC!!!!