Dhanunjaya Travels — Bus accident and services issue

On 10th Dec, we have booked two tickets for My Mother and sister (with his 1.5 years old son) The booking details are here as follows.
PNR: 3249435
Visakhapatnam to Hyderabad
VKAVERI SPECIAL(1)
Due to the negligence of the driver in the midnight around 4AM, bus met with an accident near Yeluru.The reason was he was sleepy yet not willing to give the driver seat to other driver. Due to his negligence, speeding bus hits divider and turned towards the other side of the road. and in this process, they waited for more than 3 hrs and Kaveri travels sent another bus which is a non AC And semi sleeper bus. They were supposed to reach Hyderabad by 10:00AM on 11th Dec. But due to the above situation, they have reached the destination and expected to reach by evening 6:30.
The problem here is:
1. Accident due to the driver's negligence
2. Delay in response by the tKaveri Travels
3. Alternative bus services are worse.

Due to the above reasons, My mother got hit on her head. and my sister is not well now as the alternative bus services are very bad and not what we have expected.