Deeply disappointed with poor service

I'm so disappointed with this plan last week i went for a service only to find out that my plan was not activated something like that, i still appear to have my plan with my first car funny enough i changed that car even before it went for a service. Poor service now i can't take my car for service and it's due i have to pay from my pocket but I'm paying for a service plan what for if it can't help me can someone please do his or her job.