bad call centre service

i have a warranty plan with m-sure. i moved to them because of bad serrvice with the previous company. i took my bakkie into the NTTgroup in kimberley for a quote on a fault i had with my diff lock. a lady at M-sure by the name selina said it's fine i can make appointment to get my vehicle fixed. i made an appointment for today. NTT sent them the quote, but they logged it as service and not repair of diff lock. furthermore m-sure is only willing to only pay 5k of the repair when the repair costs 20K. i drove 120km to and from kimberley for nothing. i want refund on my wasted petrol that i drove today. regards Lovelint Ngxabazi ***