Non responsive and Poor customer service

Can someone please explain the poor service from Travel Start. I have requested my flight be moved due to Covid related regulations and I have heard nothing but crickets. There is no customer call number save an automated response via WhatsApp. Honestly the poor service is deplorable and response rate sub standard. Is there an ombudsman or regulator one can contact. They need to do better and be held to task! A simple date change and no response at all just automated generic responses is unacceptable in this day and age. Do better, especially when tickets are fully paid for .