Account Deactivated because of multiple accounts. Please help

It’s been a few years since I’ve sold on amazon. I recently logged on in hopes of getting back into it and saw my account was deactivated. After some messaging back and forth I found out that it was because of a second account. I never had a second account so after finally getting them to give me the name of the account in question I had to figure out where it came from. A few years ago my wife’s cousin lived with us for a few months. She lives out of the country but she had an Amazon seller account that I was unaware of. She’d login and check on it I guess during her time staying with us an that raised red flags having 2 accounts logging in from the same household I guess. I’ve tried asking support what I can do to get reinstated but I get the same automated reply everytime. What can I do here? It was a fantastic source of income that I could really use again right now. Never had any issues with compliance before. Do any of these appeal services really help or are they all a scam?