RTO India — Regarding fitment of HSRP

Hello,
Hope you are doing well!

I want yo know that when my HSRP plate will get fit. As the appointment date was 17th july, the fitment person said me that they will came on monday and till now the hsrp plate was not fitted to my car. And they are saying me that I have to call them on thursday morning coz they can not remember. Now its your responsibility to fit the hsrp plate if i pay for home fitment. And they are saying me to came to rto office and also please tell me why should I visit rto office if I have paid for home delivery.
Now I got challan of my vehicle then I will file a case as I am having all call recording with them. But I will not pay a single rupee for hsrp challan.

Thanks & regards
Nikhil