Poor service

My service plan had two services, minor and major service contract duration 24 months. I claimed the first service which was the minor service and the second service was the minor service too and I paid it by myself. When my car was due for major service as agreed I made a claim they rejected my claim and said the second Monir service that you paid by Yourself was supposed to be paid by them. and I said I paid it by myself because it was minor service and I already claimed the minor service the one that was let was major service that is why I paid by myself. they rejected my claim and refused to refund me.