Where is the customer service?

I booked a ticket for my son before the Covid-19 lockdown and the flight was meant for June and July 2020. With Extended ockdown and rules for flights he is not able to go on the flight. I have tried to contact Travelstart to try get the dates changed for a later date, none have seemed to be able to help me. I was told last week on a chat that I will have to contact kulula to do this, but kulula sends me to comair site which tells me to get hold of my travel agent... who is TRAVELSTART. I have been panicking this whole weekend as the flight is supposed to be on Saturday. The ONLY person who has helped me from Travelstart (as Emails dont get answered) was a Chat with Bradley Bastian who helped me to understand what I am to do. The only reason I am giving 2 starts is because of his help. If not for him, this review would have 1 star. Thank you Bradley.

Regards Trevor Cuchet