Somewhere in the fine print of the documents you signed at the dealership, you agreed to let SiriusXM's marketing companies contact you.  You didn't think the trial period was completely "free" did you?

this is strange i get a call about once a day from this number, i usually let it ring through. when i do answer it, it is SiriusXM. i did not purchase my car in the denver area. I purchased it on the east coast so I feel this is a scam.

guy says he is from SiriusXM but sounded like he had an foreign accent.  I just hanged up.