have you recieved the item yet??
Or has your seller shipped the item yet??
if not call your seller and ask him/her to cancel the order.
If not, wait until it reaches you and raise a claim gong to http://eguarantee.ebay.in/eg/RaiseClaim and return the item for refund or replacement.
This will a headache to you to go through all these procedure. Hence , please check twice before purchasing anything online.