Britney Spears' ex-boyfriend David Lucado is desperate to have at least one last convo with her -- but Brit's entire team, led by big daddy Jamie Spears, is blocking him from contacting her ... TMZ has learned.
David is telling friends he and Britney were not "100% together" a few weeks ago when he was videotaped dancing and making out with a girl -- and he wants to explain himself, but he's running into a brick wall in the form of Team Brit.
Britney's camp tells us David won't be getting through because he's persona non grata at her show in Las Vegas, at her home in Thousand Oaks, CA ... and his phone number's been blocked.
We're told David never heard about the break up directly from Britney ... and he wants to have that talk, just in case he still has a slim shot. Our Spears sources say that's exactly why he's getting shut out.
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