<<I woul like to cancel this item ... Who can help me to do that?>>
Hello 'bonca...',
The only person who can help you do that is the seller from whom you bought the item.
That listing ended 2 days ago and if you paid right away after you bought them, the boots
may very well be in the mail by now. That means it is not possible for the seller to cancel.
These message boards are just for other ebay users like yourself, -- no one from ebay will
read them.
So, -- contact the seller and ask if it is possible to cancel the sale. If not, in future be very
careful before you buy, -- make sure you really truly want the item.
Under the 'Buy' button on every listing is the phrase "Add to watch list". Click that and
store listings for items you admire but are still just browsing. You can access your Watch List
from the My eBay at the top of the page.
Good luck.