Rob Kardashian has some explaining to do!

On this Sunday's season 12 premiere of Keeping Up With the Kardashians, Kendall Jenner is "annoyed" and "hurt" when she finds out through social media that Rob re-gifted the iPad she gave him to his girlfriend, Blac Chyna.

"Rob is dating someone that has kind of had a bad history with my family and he fully re-gifted my gift," Kendall explains in the clip above. "On top of it it's so annoying to find out through social media because his girlfriend posted it, like there's some things that just aren't cool and I don't think this is very cool."

She then says she's going to "tell him to give it back" and Kylie Jenner encourages Kendall to call Rob "right now."

Kendall then calls Rob and asks him, "Yo, um can I have my iPad back? No, Bible I want my iPad, my pen and my keyboard back."

Rob Kardashian, Blac Chyna, Kendall Jenner

Prince Williams/WireImage, Billy Farrell/BFA/REX/Shutterstock

She then puts the phone on speaker so Kylie and Kim Kardashian, who's on the phone with Kylie, can hear.

"What pen?" Rob asks Kendall.

"It came with an iPad, a pen and a keyboard and I want it all back," Kendall tells Rob. "Because if you're not gonna use it I have someone who actually is really dying for it!"

Kendall then becomes even more upset and starts yelling at Rob, "One I'm annoyed, two I'm actually hurt that you re-gifted my f--king gift that I went out of the way to give you!"

"That's the first time you've ever got me a gift your entire life!" Rob tells Kendall.

Kendall then asks Rob why he's being "so defensive" and he tells her that she's "hilarious."

"Buy it yourself, you moron!" Rob tells Kendall.

Take a look at the video above to see the Kendall and Rob's explosive fight!

Watch brand new episodes of Keeping Up With the Kardashians Sundays at 9PM in the UK & EIRE

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