Policy Bazaar — Updated the correct reg number but gave wrong details

I had renewed a two wheeler insurance but the vehicle number, engine number & chassis number is incorrect but the owner name is correct. I had entered the correct vehicle number but it comes with a missing letter. Chassis number nor the engine number did not show when I was renewing. It directly went to payment.. only after payment it showed everything wrong. When I ask the executive they are suggesting no cancellation nor change requests as I have updated them when I have not. I fail to understand if the registration number is wrong how can the owner name be correct? Very frustrating.