Bidvest warrenty

i have a terrible service from BIbvest car warrenty , february my bakkie injectors, glow plug and crank sensor was not working properly i made a claim they reject it , first week of July i take my car for major service , workshop that were serving my car identify some problem with my engine iintercooler was leaking,two glow plug were not working, diff lock, brake disk and left rear shaft problem bidvest horrible insurence also reject my claim