Topic: Sick to my stomach - 3DS format, Pokemon corrupt

I was going to trade in my 3DSXL to Hastings and get a 2DS.
Cool, I took out my SD card which everything was saved to, including my copy of Pokemon X. I formatted my 3DS XL.
Well, after an hour and a half of trying to deal with Hastings (that's a story for another time), I left without trading in my 3DS. So now what can I do? I don't have my old Mii or friend code (I'm not sure if that's recoverable, but that's okay) but in the process, I wasn't able to access my Pokemon X copy. I redownloaded it, and I honestly don't even know how it knew I owned a copy, but it didn't find my old save file after I tried booting it. I made a mock save, put my SD card on my computer and moved my old save file to where the new save was.
Now it says my game is corrupt.
I should have known better, but I am sick to my stomach. I've lost well over 60 hours of gameplay. ):
Is there anything I can do? Can I try moving around files some more?
And can I ever get my old friend code back or do I have to start over with that too?

Sorry for so many questions.

Once you format your 3DS its like a completely new system. In other words there is no way of replacing the stuff you had you are just going to have to start over.

I thought so. ): I didn't even realize there would be a problem beforehand. I should have known. ):
Thank you.