State Bank Of India [SBI] — change date of birth on credit card record

I have been using SBI credit card for more than 1 year, whenever I call customer care my date of birth is not getting accepted. It says data is incorrect. I want to update my date of birth on SBI credit card record. I have tried there customer care helpline but dint find any way o[censored]pdating my record. So please guide me how can i update my date of birth.