Honda — deleted chassis no. from the scooter

Address:

East Delhi, Delhi

Dear
sir/ madam
I have bought a honda Activa scooter from dealer Swaroop Honda at Vikas Marg Preet Vihar in June -2009. I couldn't renew the insurance of scooter which has expired on 16 June-2012 due to some unavoidable circumstances. The chassis no. of scooter has deleted in three years, Now the insurance company refused to renew the insurance with out chassis no. on the vehicle. So please guide me how can I get chassis no. my scooter and renew the insurance. The name of insurance company is oriental insurance.