As of two hours ago the FB charges that started all the trouble have been refunded (the transaction dates have all changed of course, but you can clearly see that FB has returned the money) and CapOne has refunded the overdraft fee. I will check again in the morning when the account information is available, but so far so good.
Thank you all for your support and advice, but please pardon me as I am going to shamelessly ask everyone to send a few 'good thoughts' my way while I wait for my new bankcard to arrive and put the