My seller account was automatically upgraded to the professional selling plan for all marketplaces

Hello, I’m not sure if this is the appropriate place to post this so please let me know.

My account was automatically upgraded to the professional selling plan for all marketplaces. I am located in the US and I have previously downgraded my account to an individual selling plan. I have not listed and do not plan to list any items for other marketplaces other than the US.

I logged a support ticket for each marketplace but I only get a generic “how to downgrade your account” response. I really need help getting the fees refunded but so far, no luck. Any help would be greatly appreciated, thank you.