Welcome to TinyDeal,
Please contact us as soon as possible if you want to exchange your item after paying. If the item is not shipped we will exchange it for you after confirming the different price of course. If the item is shipped sorry we cannot exchange again.
If you want to exchange your item after getting it, please send email to us, we will give you the return adress to return for exchange.
Any questions please contact us by Customer Service Express: https://help.tinydeal.com/contact-us