CELLPHONE INSUARANCE

I bough a cellphone(blackberry Z10 WHITE) from jet store at carlton centre around January 2014, the phone was insured because i was buying it on credit, the phone then just went off after a couple of months, i took it back to jet store, they took it in for repairs at MTN, the phone was then exchanged because it could not be fixed.<br> when i went to collect my phone at jet, they gave me a new phone, and 1 document that has an IMEI number of the new phone. the phone then got lost three months back, i reported the phone at police station and went to jet to do insurance claim. the claim was unsuccessful because there are outstanding documents, which the store did not provide me with and they did not record the new phone on the system. so am paying insurance for a ghost phone. now i have to go up and down trying to get a copy of exchange from MTN so that the insurance can approve the claim and am not wining.