Akon to Egyptian Singer -- Pitbull's My Dawg ... But He's Not My Bitch

Akon does not have Pitbull on a short leash, and never promised the rapper would perform for an Egyptian singer's music video ... this according to new legal docs filed by Akon.

TMZ broke the story ... Tamer Hosny sued Akon, claiming he paid the music mogul $300,000 for Akon and Pitbull to guest on his song "Arabian Knight" -- and ALSO star in the music video.

Tamer claims Akon failed to produce Pitbull for the video -- which ultimately torpedoed the whole shoot.

Now Akon's firing back, insisting he's not Pitbull's agent ... so he could NOT and did NOT tell Tamer Pitbull would show up. He also claims Tamer only paid him $145,000 ... not $300,000.