Salam
Here are a few questions,
Did you use GoPB app for generation of challan for transfer of ownership fee?
Did you specify which excise office you'll go to for the physical inspection?
If you have paid the challan and the previous owner biometric is with you then you have to take the car with all the documents to the specified excise office in your transfer application and show it to the inspector. He will initiate the transfer and then you'll be issued a new card.