So I did some really stupid stuff about 3 years ago on Facebook ads and I was banned rightfully so.
I'm no longer about what I use to do in the past.
Is there any way to get my account back?
I know this is not what you want to hear, but most likely you will not be able to ...
cmdeal is right. It's part of the process mate, only way is to get another account, so start creating one (or more.) In the meantime, use one of your friend's or family's account
I got banned for white hat, my audience was off, so it had high feedback on big spend. They ban you black or white.
To get a new account, hit up relatives, and ask them if you can use their ad account (which in most cases they don't even know exists)
They ban you usually when your creatives violate the ad policy around two times,in this case you can try to contact with them honestly.If your activity not so unforgivable,they may reactivated your account,but first plz confirm you are using white method and not in high risk indurstry.
If it was 3 years ago you got a chance of getting it back. Open a ticket and tell them you have a new business (think of some real business) and you will like to expand your Adwords advertising with Facebook, but your ads account was deactivated 3 years ago for not following their advertising guidelines by mistake, which now you have read carefully. You can mention some big budget as well. Make sure that everything sounds legit, they are not stupid.