Income tax Refund query

I had refund got refund via cheque (despite mention direct credit into my Bank A/C, while filling the refund) for my Income tax (AY 2008-2009). Now Speed post of refund cheque got undelivered due to address change?
What should I do now?
Any remedy to get refund back?

Normally they send the refund to your PAN Address. Is your PAN address is also change recently?
If yes please contact the IT Office where you have submitted your IT Return.