Bookings with Travelstart

Please be very cautious when making bookings with Travelstart. I have made a booking with them to New Zealand for April 2020. They do not have a contact phone number or offices that you can go to. All correspondence is via mail. Every-time you get a response from another consultant , so their is no continuity in your conversations. All flights needs to be completed by December 2021. If not completed then you can claim a refund of about 50% of the original cost that you have paid. I made rebooked and they quoted 100% on the cost of original ticket. Still I cannot speak to a consultant to assist me with best options.