Hero Motocorp — i am complaining about the registration certificate of my splendor bike number dl3see4932

Dear sir/ madam,
I am yogendra. I bought a splender bike from pashupati showroom of hero motocorp adhchini in january 2019 but i have not received my rc yet. When i went to receive the rc to the sarai kale khan rto office i got to know that the address mentioned in the rc was incorrect and as i had not received any insurance paper or invoice from the showroom so i could not make the corrections of it. This mistake has been done by the showroom's staff. When i asked them to make the correction they denied to do it. Even a single installment has not been recovered from me. I am not able to understand what is going on? I request you to coordinate with the showroom and help me out. Thank you.