Domains once registered can not cancelled or refunded ,however there is a period of 48 Hours where the registry actually allows you to cancel the domain if it is incorrectly registered and register the correct one . To take advantage of this you should quickly contact our support team before 48 hours with the correct domain name which you want to register.
You can do it at:
http://m2host.com/clients/cart.php?a=add&domain=register