I had a Freelander 2 internal gearbox failure at 55k. Car bought from main dealer as pre-owned vehicle and serviced at main dealer according to service interval. I was informed that I do not meet their criteria for help with costs for repair ( £3700) even though I have bought two commercial Land Rovers. What are my rights or best advice to get costs met by main company?

For information it was outside of manufacturer's warranty period. I have considered pursuing costs through a small claims court under the sale of goods act; whereby the gearbox is not fit for purpose.