Help please! For some years I have had a standard international postage charge in my listings of £15. This has generally been more than the actual cost and I make a refund of the difference to keep it fair. Postage costs have increased considerably and I am finding that the actual cost is regularly more than the £15 and it's difficult to ask for the extra cost. I would like to increase the standard charge in my listings to say £20 but I really don't know how to do it so I would be grateful for any help.
