Jul 22, 2013
Amazon told that i have to contact with sony!!
First of all you didn't contact Sony by posting here. There is a "Contact Us" link at the bottom of this page for that though.
Secondly Amazon is giving you the run around if they said to contact Sony.
Jul 23, 2013
Also make sure that the cards are for the proper PSN Region that your PSN Account is in. If your PSN account is UK, for example, and you purchased the PSN Cards from the US, they will likely not work on your UK PSN account.