Moved this to 'My Account' Online for better attention. Until someone chimes in here I would advise you to use the online Chat or the toll-free phone line for Customer Service (not Technical Support) as a faster and more responsive approach.
They are linked under Useful Links or McAfee Support at the top of this page.
I am sure they will refund any over-payment.
Pity you hadn't posted this earlier as I believe they are closed at the weekend.
Emails are always the slowest way of getting a response.