Items can only be cancelled by the seller and they are not obligated to doing so as sellers are charged fees as soon as a buyer buys.
If they are purchased, you can ask the seller to cancel or pay for them and resell of gift them.
Chances are the seller will open unpaid disputes and you will be issued with strikes on the account.
If they are only in checkout from the cart or without having committed to the purchases then simply remove from cart.
