Hi there waikei0612,
Keeping track of your foreign currency transactions is crucial, and using the Multicurrency feature in QuickBooks Desktop enables you to do so with ease. It sounds like you're familiar with how the set-up process should go, so let me point you in the right direction to be able to fix the issue you're running into.
It sounds like there might be some data damage within your company file. Both the Rebuild Data tool and the QuickBooks File Doctor will help you to fix minor company file issues, and you have the option to manually rebuild your data as well. We have a great article that goes over al of these options in further detail:
If those tips don't quite do the trick, then you can reach out for support outside of the Community where our agents can do a screen share with you and provide you with some alternate troubleshooting steps. You mentioned that the agent wanted you to pay a fee, so I also want to leave you with the Intuit QuickBooks Desktop software support policies so you can better understand the fees involved in receiving support.
Let me know if you have any other questions. I'm here to help.
