Why did you get a ban?
I was banned for 10yrs from GTA Online back when DNS 'mods' were the thing.
Or well, actually it was a little before the DNS times, I used the better method, but what ever.
But what I did was submitted a ticket to support and obviously came up with cool stuff like:
"I WAS HACKED!! I JOINED LOBBY AND HACKER GAVE ME LEVEL AND MONEY AND NOW IM BANNED???"
And I got unbanned easy as that.
Was it an Xbox Live ban on your gamertag, an Xbox Live ban on your console, or a Rockstar ban on your gamertag?
I'm guessing it's not a console ban as you'd obviously be talking about needing a new KV. Those Xbox Live gamertag bans are gonna happen as often as every day or two when you're modding though. Like others said just make a new gamertag for those bans. If those gamertag bans start happening several times a day, maybe consider what you're doing that might be an added risk that other modders aren't taking (like if you're posting your gamertag in public, streaming your lobbies, etc). If it was a Rockstar ban message then it's also just on that gamertag, and I've only heard of those popping up for people who are streaming their money drop lobby (especially on twitch). Mostly it's XBL that is gonna get to you first before Rockstar on the gamertag bans. Hopefully you get everything resolved.