Credit: Fame Pictures; Splash News

Either Brad Womack needs to cut the cord -- or Emily Maynard needs to change her phone number!

Although the Bachelor star, 38, and single mom Maynard, 25, officially called off their engagement in June, sources tell the new Us Weekly that Womack is having a very hard time letting go.

"He calls Emily every day and at all hours!" a source says of Womack, who pesters Maynard in Charlotte, North Carolina from his own hometown of Austin, Texas. "She just doesn't pick up. They actually haven't spoken for months."

Indeed, Maynard (mom to daughter Ricki, 6) has certainly moved on -- even going on a few low-key dates with NFL pro Jeremy Shockey of the Carolina Panthers.

But when false web rumors in August claimed Maynard was dating wealthy scion David Smith (actually just an old pal), Womack flipped. The bar owner "filled up her voicemail with messages of him crying, saying how upset he was that she was with someone else," the source reveals.

Despite the creepy calls, Womack remains wishy washy about the relationship, says the source. "He doesn't want her back. She feels like he is so messed up!"

For more on the post-breakup Bachelor drama, pick up the new Us Weekly, on stands Friday.