If I understand correctly, if not ask if they will do revision of the listing & alter the postage which will defo work.
How to get out of the shitting program -
To opt out of the Global Shipping Programme at an account level:
Go to My eBay > Account > Site Preferences.
Click the Show link to the right of the Postage Preferences section.
Click the Edit link to the right of Offer the Global Shipping Programme.
Click Opt Out.
Review the information. If you still wish to opt out, click Continue to opt out.
To remove a single active listing from the Global Shipping Programme:
Go to My eBay > Activity > Sell > Active.
Select the listing you'd like to change.
In the Edit drop-down menu, select Edit selected.
In the Add postage details section, click the Edit selected policy link.
In the International postage section of the Edit postage policy dialogue box, clear the Send it to the UK Shipping Centre, and the rest will be taken care of for you box.
Save and confirm your changes.
To remove all active listings from the Global Shipping Programme:
Go to My eBay > Activity > Sell > Active.
In the Edit drop-down menu, select Edit all listings.
In Edit listings, select all of your listings by checking the box at the top of the left column.
In the Edit drop-down menu, select Postage policy.
In the Edit business policies dialogue box, select Change to from the Postage policy drop-down menu, and then click the edit link next to the postage policy name.
In the International postage area of the Edit postage policy dialogue box, clear the Send it to the UK Shipping Centre, and the rest will be taken care of for you box.
Save, confirm, and submit your changes.