To give you the best agent who can provide you with exact explanation and further elaborate information, I suggest contacing our QuickBooks Online Care team. They'll be able to verify the amount place on your account and is the safest way to pull up you account in a secure environment.
That should provide information about the surcharge increase. Let me know how things go after speaking with our phone support. I'll be on the lookout for your reply and to further assisting you if you have other questions. Wishing you and your business continued success.