Who called from 7203760968

I called back no answer read other posts and figured out they are scammers

They use "robocall"  it's a computer that dials all possible telephone numbers within an area code and exchange.  They do not check numbers against the Federal DNC list.

Register your complaint with the Federal DNC list.

Register your complaint with the Federal DNC list.

Uh, I suspect that they may have more than one outgoing line for these purposes.