Can not get hold of them at all

I have been trying to contact Travelstart to change a flight for a day now. I have a flexible ticket, but as there is no way to get hold of them, other than the contatc form, you are dependent on them getting back to you. The Whatsapp chat just waste your time, because the outcome of every single engagement is to fill in the contact form. In these Covid times where changes have to be made quickly, it is pretty useless to use Travelstart. This was my last time using them, as my daughter needs to fly tomorrow, and I will probably have to book a new ticket. An online agent should at least have a website that can handle changes immediately.