debit card blocked — How to unblock my blocked card

Address:

YSR, Andhra Pradesh

I have been trying to inform SYNDICATE people that my card has been blocked as, when i try to login my registered card on syndicate bank website it says- Due to the number of failed attempts we are unable to register your card at the moment. Please call Syndicate Bank to continue your registration. Also whenever i am trying to shop online, at the time of payment i am getting an error saying that, For security reasons your purchase has been prevented from being processed.