Travelstart client service is the worst ever...

I have a Ticket to New York that I need to use before end of April. It was booked before lock down started 2020. I have been trying for weeks to rebook tickets. The What App system is the worse inefficient way of dealing with customers ever. 2 weeks plus will pass before you even receive any response. Then the cost will skyrocket to double the original cost. Once you have a response you literally have an hour to decide if you want to take it or not. PLEASE BRING BACK IN PERSON CONTACT. My time is running out!!!!!