Bank Of Baroda — note exchange not allowed.

Address: 712311

Dear sir,
I am ex. Cg employee withdraw my pension from sbi br. Subsequently i deposited my property tax of above br & securely submitted my said tax. Furthermore i requested to cashier for exchange rs.500/- to little denomination note but he did not allow to exchnge the note of bank of baroda, dankuni br. Sir is there any embargo not to excgange any big note.
Thanking you