received twice represented as a collect call from a prison

Received call from this number at 12:09 am this morning on my cell phone. Did not answer fast enough but would not probably of answered as do not answer numbers I do not know. Have read a collect call from and inmate in VA. Not happy as I an not healthy and I need my sleep and now can not go back to sleep. Why would a prison allow an inmate to call at this hour?

Received a call, no message left.

Called my cell phone x 2 back to back caller "Tony Sandres in Manassas Va .' I don't this person or tel. # so didn't not answer call and no vm left .

Called cell phone 3rd time  I'd Tony Sandres ,  do not know this person ,# blocked