Income tax refund

I have received a refund for AY 2010-11 but the cheque received has been mentioned wrong Account number. So i send the cheque back to CPC. Now i have to file Refund Reissue Request. For that purpose i want refund sequence no. & Cpc communication number. From where i can get that??? My return has been filed manually & i lost the acknowledgement slip. Is there any way to get my refund back. Plz Reply