I recently purchased a new phone and activated it with simple mobile as my carrier.. It...

I recently purchased a new phone and activated it with simple mobile as my carrier.. It then. Came to my attention that my caller ID displays ( On star Operations ) as my caller ID rather than my phone number. And name ..This is a problem as most people won't even answer my call siv noticed.. Can you please explain to me how this happened. It's a brand new phone with a brand new number and I've never had Onstar services in any vehicle Iv owned.. Iv tried to resolve this myself by turning caller ID off but it still displays the same .. Iv reached out to carrier and asked for their assistance only to find it's out of their hands and there is nothing they can do to shut it off.. I'm freaking out about this now because I have no way of knowing why this program picked my phone to be on how it got there or what it's actually djoi g ..is it running onstar programming in the background and spying on me ? Am I being investigated by law enforcement ? Is someone tracking me ? I've been being staked recently and bank has placed hold o.y accounts due to suspicious activity .. this is very creepie please explain this to me and advise me what to do .. thank you for you time