Bus Cancellation Ticket amount is not refunded

Location/place: Bangalore

Name of company/service: NDS

Sir,

I booked the Kesineni Travels Bus tickets through online. Later BUS is cancelled due to some technical problem.
Till now amount 3750/.. is not credited.
I had so many reminders over the phone and e-mails but no responce.
Here are the details:

Date of Journey: 25/05/2012

PNR No: 0DEA01

Kesineni Tours & Travels

1-124, Nizampet,Hyderabad-500072,Andhra Pradesh,India.
Voice: 91-40-44771777 / +919885 777 777 Fax:91-40-23892580.

Name of the Passengers:

Y Bangarayya
Y Srinivas Rao
Y Sudha Kumari

From Rajahumandry to Bangalore