When you rent a car, you need to kick and scream and stamp your feet and LOUDLY INSIST that you will not get any "followup" calls as a condition of the rental. I rented a car from Enterprise in Grants Pass, OR. I was told I would get this call. I told them I didn't want the call. I was told they had no way to prevent this, and sure enough, I got the call. I initiated a complaint to the regional manager. The regional manager told me that my number was put on their own internal DNC list, and he thinks it is a nationwide (for Enterprise) DNC list. We'll see when I rent a car somewhere else.
ALso, don't EVER EVER give out your cell number. This is just inviting those calls. If you don't give them your cell, you won't have to worry about getting called on it. Most people have answering machines, just give out your home number, and if the car company needs to call you, they can call your home, and you just call to check messages.
I had a reservation with Enterprise recently but canceled. Then I received a voicemail from 301-223-0045 stating this was not a collection agency but had a survey for me.
Uncalled For.