Ramadan Promotion

I have topped up my account with more than 100USD during ramadan for the following promotion: 

http://community.eu.playstation.com/t5/PS-%D9%85%D8%AA%D8%AC%D8%B1/Ramadan-Top-up-Offer/td-p/23347875

I have got an email with a code to redeem for the 20USD, however it is invalid code! and there is no email or any contact method fto report this to sony !