State Bank Of India [SBI] — forgot du no

Dear sir,
I had applied for osstet exam. The problem is i forget to store du number when i will paid a fees 300 rupees i will forget to collect my du no. It is very necessary please give my du no and i my reference no is du99173378. Now i require my du number. So, please help its very emergence. My details are:-mail id [protected]@gmail.com.
Thanking you sir.