Indian Railways — wrong notification for rrb exam 2018

Address:	Patna, Bihar, 800002
Website:	rrbonlinereg.in

Dear sir,
I'm alok kumar from patna of bihar
I'm very worried to say that i couldn't be appeared in the rrb exam only because of railway wrong notification.
My exam was to be taken on 5th december, 2018. Therefore i had booked train ticket according that date but i got the message on my registered mobile no by rrb on 2nd dec 2018..in which, there was mentioned my exam is scheduled on 6th dec., 2018.
Following this message i cancelled my train ticket... After few hours i got one message..in which it was written "ignore above message..."
You can download my admit card and check that out.
Reg. No. (Username): [protected] for rrb cbt 2018
Dob (As password):[protected]

I applied the form from obc category and paid for this rs. 500, in which rs. 400 was to be refunded if appear in the exam but i couldn't be appeared because of wrong notification.

I want my rs. 400 cashback.
Please sir help me.