100Bestbuy.com — Money in my account get venished

Address:	Jamnagar, Gujarat, 361140
Website:	100bestbuy.com

I had purchased product and i dont like.so i had return it.after that they have credited my amount to my account in 100 bestbuy.after some time i had try to open this site at that time it will show some message like...site is under maintenance. So i had tried after few day at that time i m not able to open it.many times i tried to contact the customercare.but never contact them.kindly do the needfull and suggest what to do.