Delhi Transport Corporation [DTC] — Bus conductor refused to offer vacant seat next to him

Respected sir,

I was travelling in bus no. 874, having number:DL1PD-0219 on 10 June 2022 .
The conductor refused to offer the vacant seat next to him (as the bus was full and many passengers were standing)
Kindly seek explaination from conductor regarding this or please let me know about dtc rules as how many seats are reserved for bus conductor .
This act of conductor has certainly lead to inconvenience for fellow passengers, and ruining the image of DTC buses .
I'm attaching the pictures of my ticket and vacant seat that remained unoccupied during whole journey.
Thanking you!