[xdude]

Do they charge extra charges like registeration fee and on because once i tried to buy a domain they told me 10$ per year when i saw they have deducted 15$ when i ask they said registeration fees and etc etc

Which Domain registrar did you use ? Because they cant do that. Only other fee would be ICANN fee which would be about 30 cent usd. Nothing else.

But also you should check your cart before checking out for any other stuff. Like other added services such as Whois protection etc.