Simply the Worst

As most of the reviews describe, Travelstart is simply the Worst. No support of any kind is provided and trying to be able to actually speak to anyone is literally impossible. What is the point of having a contact number which only has an automated voicemail? What is the point of "live chat" when it only has automated responses? For more than a week, I have been trying to get information about changing my booking which consists of an outgoing flight with Mango and return flight with BA. I needed to change a name on the booking as well as changing dates - for which I purchased the extra flexible date change feature. First response received just said "change name directly with Mango". Ok, so what about my BA flight and what about the date changes? Eventually a response from Ruqaiyah (appreciative that an actual name was provided) providing more details about changing the name with Mango and advising that BA doesn't allow name changes, therefore I should advise if I would like to apply for a refund. I rep**** asking about the details regarding the refund, especially since the other traveler has a medical certificate and to date still no response? I need to urgently change my travel dates which are originally scheduled for 19 and 24 March and am out of ideas as to how to deal with this useless company.