Unable to talk to anyone at this company

This company has no contact number except for a chat on Whatsapp which was next to useless. My son's flight scheduled on 10 October had to be postponed - we sent countless emails and contact form requests. Eventually choosing suspension of the flight resulted in an email that the flight had ben suspended. What this means in terms of costs and penalties,I don't know because I can't speak to anyone. I even contacted Air France to see they could help me but was told that only Travelstart could assist and in future I should rather book directly. Talking to a Travelstart chat agent on Whatsapp eventually, I requested are re-booking. After the slowest chat I have ever experienced I was told I would be sent a quotation of the new flight via email. 24 hours later, I am still waiting.