You can contact the eBay Connector by Intuit Support Team to further check your billing details, Dean. They'll be able to provide more specific guidance and explore your options regarding cancellation and a potential refund.
Given the challenges that you outlined, especially when it does not seem to be functioning properly in the UK and the currency discrepancies are affecting your transactions and reports. I recommend contacting the eBay Connector by Intuit Support Team.
To get in touch with them, you can email the address provided in the link and visit the Contact or Support section located under the Overview tab.
If you have any additional questions or if there's anything else I can assist you with, please let me know.