'Broken Hearted' Rob Kardashian Reportedly Boozing Hard & Hooking Up With A Call Girl!

Still reeling from his break up with Rita Ora, broken hearted Rob Kardashian  has been finding comfort at the bottom of a bottle and in the company of a call girl, according to a bombshell new report in Star magazine.

The sexy blonde escort shared her story — and texts between her and Kardashian — exclusively with Star, giving a full critique of Rob's bedroom skills along with her account of his heavy boozing and partying.

Not surprisingly, the Kardashian family is said to be concerned about the 26-year-old's carousing, which is reportedly spiraling out of control.

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"Rob is a complete mess. He drinks like a fish, starting in the afternoon and going all night long," a source tells Star. "Even worse, he's hooking up with paid escorts, and his business is tanking."

Mom Kris Jenner  and sister Khloe Kardashian  have tried to talk sense into Rob since his recent boozy birthday night with Lamar Odom at Hollywood's Greystone Manor, but their pleas have fallen on deaf ears, according to Star.

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The reality star got his heart broken late last year after learning that Ora had cheated on him, although she claimed she never thought of them as being in a relationship or as "boyfriend, girlfriend."

The romantic rebuttal  reportedly sent Rob over the edge, sparking a cycle of drinking and sexcapades, as well as a 40 pound weight gain  which he is now desperately trying to lose by joining rapper The Game in his '60 Days of Fitness' exercise plan.

For the full explosive story pick up the the new issue of Star magazine -- on newsstands Thursday.