Symphony — Symphony Air Cooler customer service not responding

I purchased a Symphony MAXWIND 55 Air Cooler from Vijay Sales on 15 April.
The water pump in my air cooler became defective, so I raised a service complaint on 02/06 by calling the customer service number [protected]. The complaint was registered with ticket number HS[protected].
However, when I checked the complaint status on WhatsApp the next day (03/06), it showed "Ticket Not Found." As a result, I had to register another complaint with ticket number HS[protected]. Unfortunately, the status for this ticket also showed "Ticket Not Found." I then had to raise a third complaint, ticket number HS[protected], for which the status was displayed as "Open."
Even after 48 hours, I had not received any call or visit from a technician. On 06/06, I received a WhatsApp message stating that my first ticket (HS[protected]) had been cancelled as a "Duplicate Call." Furthermore, when I checked the status of my third ticket (HS[protected]), it again showed "Ticket Not Found."
It has now been more than three days since I first reported the issue, and I have still not received any communication from a technician.
How is it fair to inconvenience customers by not offering an option to speak with a customer service representative over the phone and forcing them to depend solely on WhatsApp for lodging and tracking complaints? This unnecessarily creates significant inconvenience and delays in resolving issues. Why can't Symphony recognize the importance of an air cooler during the scorching summer season and handle customer complaints in a more efficient and customer-friendly manner?