I just got the RG35xx and it's already unusable

I just received my RG35XX in the mail yesterday and for the first night, everything was fine. Today, when I tried to reload a save file it just restarted the game and wouldn't load the save file at all.

I tried to see if there was anything I could do to fix it, and accidentally switched to GarlicOS. Now none of my buttons are working. Not the D-pad, the menu the start button, nothing. No matter how many times I click or how long I hold them down. I heard that some file can be removed to fix this, but when I try to connect my computer it says it's an unknown device and there is no driver for it.

I've checked the Anbernic website and this subreddit but haven't found any way to get the buttons to work and no way to get the RG35XX to register on my computer.

I'm about to just return it because I'm at a complete loss of what to do.