missed call on cell phone

Received lawn service flyer for "Mat" of J/M Lawn with this number. It requires a mail box ID# which was not provided. I would like to use the services but can not get through

This # is AT&T's Cellular Voicemail

A person called Robert called my 13 year old nephew and left him a long voicemail saying that he wanted to kiss him all over his body and that he loves him. He also rambled on about wanting to watch the princess bride with him among other random things. Very disturbing.

SOMEBODY CALLED MY NUMBER TWICE AND DID NOT LEAVE A MESSAGE