Just silent instead of helping

The treatment of these people leaves a sour taste into one's mouth. I called them about a week ago requesting for a booking for service like they promised when I took their policy. Now that it's time for them to keep the end of the bargain they are ignoring me. They requested some information of which I've given to them and now they are quiet, and my car is overdue for service, and it keeps adding the kilometers since I am using it daily.