its a call from your friendly car dealership reminding you its time for your snake oil service...oopse, i mean, your routine maintenance

I got a message from a car dealership, who I had taken my car to once a couple years ago, calling to remind me to bring it in for an oil change.

Found out they are a telemarketer and get #'s of past customers of car dealerships to pitch
"bargain" services such as oil changes, brake jobs etc.

Called me on 5-6-10 @ 9 am  no message just a hang up call

This number calls me at least 10 times per week.  I want it to stop.

This was a telemarketer making an offer for a service special at the car dealership my truck was serviced at in the past.

Who exactly is it?