Root Emergency i need your advice

[suadkoh]

Hello everyone,
I am new to this forum and I am here to seek help and advice.
around 4 months ago my father an ios fan boy bought me a Samsung galaxy tab 2 10.1. First what I did whit it, I rooted it and installed cyonogenmod. Everything was fine untill till now cuz my father wants to sell it and said to me that I should put it to stock but i screwed up now there is nothing just the stock recovery and download mode.I don't now where i made a mistake and I would appreciate any help thnx a lot.

p.s
He gave me an ultimatum 14.3.14

 

[El Presidente]

Moved to the Galaxy Tab 2 Root area, the guys here should be able to assist.

I'm not sure of the specifics, but can you use odin to flash the stock firmware from here: Firmwares | SamMobile

 

[suadkoh]

Moved to the Galaxy Tab 2 Root area, the guys here should be able to assist.

I'm not sure of the specifics, but can you use odin to flash the stock firmware from here: Firmwares | SamMobile

Thnx