As you are looking for helpline number of State Bank of Bikaner and Jaipur to block ATM Card, so here I am providing helpline number.

Toll Free Number
For queries related to Loans, Deposits, Service charges, Rate of interest on Deposit/Loans & information related to ATMs
18001806005

Card Lost or Stolen Helpline Number
Toll-free help line no. 1800112211 from MTNL/BSNL land lines
OR
Call 0091-80-26599990 from other mobile/land lines

You also can Block your ATM Card by using these simple steps.

Step 1: Login to www.sbbjonline.com with your username and password.
Step 2: Select "Block ATM Card" link under the "e-Services" tab.
Step 3: Select the Account, under which you want to block your ATM cum Debit Card.
Step 4: All the Active and blocked cards will be displayed. You will be shown the first 4 and last 4 digits of the card(s).
Step 5: Select the Card, you wish to block and click "Submit". Verify the details and confirm.
Step 6: Select the mode of authentication as either SMS OTP or Profile Password.
Step 7: On the next screen, enter the OTP password /Profile password as chosen earlier and Click "Confirm".
Step 8: A success message would be displayed with a Ticket No. after successful blocking of your ATM cum Debit Card. Note this Ticket No. for future reference.