Bad service and unsatisfactory

My name is Bongiwe, I am so unhappy with vodacom insurance as when they need to process my claim now I get stories, a repair that cost R1506.50 since they say my device is covered for less than what it should have been yet that is not my faulty, now as a customer I need to keep following up with them and not get any feedback of when will the claim be sorted, instead of them saying I need to pay the difference since they made the fault no I need to keep waiting for them for who so ever that needs to calculate how much extra I need to pay a simple issue of me paying the difference is taking them almost 4 days. at first how do you cover a device of almost R4000 for R1500, now I need to suffer because of the faulty they made their side.