Tired of extra unnecessary charges and changes

I've been a seller on Bidorbuy for many years and recently found that they changed some of their categories and decided to charge sellers \listing fees"over and above the commission they charge after a sale is completed.<br> I normally relist items very regularly when they don't sell for a further period and Bidorbuy sneakily add these listing fees and don't highlight this sufficiently on the listing confirmation page and are not bold enough to be noticed.<br> Because we relist regularly"