Non-responsive to Communication

There is an inability to get hold of Travelstart. I need to make changes to my booking but I am unable to speak to anyone I entered my query into their whatsapp chat, with their automated response:

'Please wait while I transfer your chat to one of our live agents. Meanwhile, please feel free to type in your query'

It has been over 24 hours with my whatsapp messages gone unanswered.

I've used Travelstart for over 10 years, and the service has really changed recently. SO SO disappointed, all I want to do is talk to a travel agent, Is that too much to ask for from a travel company?