Link Utsav — Non Receipt of HSRP Sticker after confirmed Order ID

I have a Maruti Celerio car HR26DU5930.
I applied for hsrp sticker online on 07 Jan 22 and got a confirmed appointment receipt for the same from Link Utsav for 12 Jan 22. Order ID STHR4C3B9FCA-7F46.
I am attaching a copy of Appointment Confirmation Receipt for your reference.
However on going to Link Utsav I was told that there are no records of my booking and appointment and asked me for time to check details. Despite my numerous calls and emails I was told by Mr Dharampal that my above booking had been cancelled and that I should book online again for a fresh appointment.
On booking online again for a fresh appointment I got a message that order for this registration already exists. Attaching screenshot for your reference.
I do not know what am I supposed to do to get my hsrp sticker. Please resolve the issue.