Sorry to break it to you, but you were most likely conned. You purchased a pirated serial number and now you're out of money, and don't have access to the software you paid for. It's also not unlikely that the installer you got from them contained viruses or malware.
The lesson here is to be careful and always buy your software from a reputable source, preferably the manufacturer itself.
Maybe you can still get your money back, depending on how you paid for it...
thanks for your help
i have purchased it using paypal , how can i get my money back ?
You can ask for a refund for your payment from within PayPal. Explain your were sold an invalid product.
ok , thanks for your help
is there any way to get the Photoshop for cheap price and legal ?
What do you mean by cheap?
The Photography Plan is US$10/month subscription.