How to restore a tablet to it's factory default?

I have a Samsung Galaxy tab A. Model number is SM-T350. I stupidly tried to root it following the instructions of a website. And it will no longer go past the Samsung logo when it boots. I can get it to download mode. And have used a program called Odin to flash a new os onto it. But every firmware I've tried I get the same result;flashing samsung logo. I used this website to get the firmwares. And I've tried %90 of them. http://www.samdown.com/samsung/SM-T350/

Can someone tell me what I'm doing wrong? Or possibly point me to a working firmware for my tablet?
Added (1). It's not "stuck" and it's not "destroyed". It still allows me to access the recovery menu and download mode. One firmware I downloaded from the site mentioned above, allowed me to access my OS again. It just wasn't the right version, because apps and services on the device had pop ups constantly telling me certain services and apps were not working properly. So that told me that I can still repair it, I just need the right firmware.

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