If you go to = https://sellercentral.amazon.co.uk/help/center?redirectSource=HelpHub

Then click near the bottom where it says "My Issue is not listed", where it then says "describe your issues" type in "speak to seller support". It will then ask you to confirm your issue. If you click on Account Deactivation" a box will pop-up that says "Contact an associate". You should then be able to request to contact them via email, chat or phone (currently showing less than 1 minute wait time but how accurate this is I don't know)