Money debited twice from my account

This is the worest transportation which is dealing with public. As a trnsport it should
be comittement. I have cancelled my tickted on Dt.19.03.2012 from gnagaathi to bangaloere which is refund amount rs.312.00 till date not credited to my account
and no response for my mail.It is a small amount but impact on public is more about
KSRTC

Muralikrishna.B
Gangavathi