The eBay Concierge team has now replied at 9.42am 8th April to the question I raised yesterday regarding whether my account will be restricted or sanctioned If these incorrect fees are not paid.... below is what they have emailed which I hope is useful to anyone else who may be affected by this problem.

we are currently working to resolve the issue you reported and appreciate your patience while we investigate. 

At this time, we are unable to stop the system from attempting to collect the funds, which is why you may see additional attempts on your account. 

Please note that you were charged on March 13th. From this date, you have 30 days of protection. This means you remain fully covered during this period and within this time, we will resolve the issue. Once resolved, any amount that was incorrectly charged will be refunded to you. 

I appreciate you taking the time to contact eBay today and thank you for your continued business.

Have a wonderful day.