Thanks for letting us know about this, @adrew123.
I have some information about the incorrect amount due of the invoice. If in your QuickBooks data the customer's due and upfront deposit is correct, I suggest contacting our Merchant Services Team. This way, they can verify and investigate further.
Please use this link to reach out: Contact Payments Support.
In case you need help with other customer tasks, click this link to go to our general customer topics with articles.
Keep me posted if you have questions or concerns with QuickBooks. I'll be happy to answer them for you. Take care and stay safe.