This number belongs to typical refund scammer “Mr. David”. It’s the usual script, you have to cancel the services or $300 will be charged to your account!
(925) 483-8050
Have fun!
I called them and they let it go to voicemail. It’s a text-now subscriber number.
I did 
David is in this old video of mine
https://youtu.be/jYMwAwnUJVY
I called him back and I think he crapped himself