As per your concern I will get details of Union Bank Of India, Debit Card and way to block also.

Here are some customer care number who can help you to block your card

All-India Toll Free number : 1800 22 22 44 / 1800 208 2244

Charged Numbers : 080-25300175

Dedicated number for NRI : +918025302510

About card
A Debit Card is personal card provided to the customers by the Bank to enable the card holder to withdraw money or to have the cost of purchases charged directly to the holder's bank account.

Features of Union Bank Debit Card
Multiple Account Access- Customer can access up to three accounts linked to a single card.

Add-on-Cards are issued in case of Joint Accounts.

Secured online transactions are available through Usecure registration.

Cash withdrawals are possible at specified merchant locations.

Free Insurance is available against accidental death.

Facilities such as 24 hour hot-listing facility are available.

Charges
Withdrawal Limit ATM - Rs 25,000/- per day

Shopping Limit POS - Rs 25,000/- per day

Joining Fee Nil

Annual Fee Rs 100/- + service tax from second year.

Card Replacement Fee Rs 100/- + service tax

Regeneration of PIN Rs 25/- + service tax

Currency Conversion Charges 2.50% of transaction amount

Withdrawal from other bank ATM Metro locations:- Free up to 3 transactions per month Rs.15/- + service tax thereafter

Non-Metro locations:- Free up to 5 transactions per month Rs.15/- + service tax thereafter

Withdrawal from ATM abroad Rs.125/- + 2.5% of currency conversion charges


Address:-
Union Bank Of India
Union Bank Bhavan, 239, Vidhan Bhavan Marg, Nariman Point, Mumbai - 400 021, Maharashtra, India

Phone:-
022-22892000