Travelstart? not

On 02/11/2022 I booked and paid for flights and a rental car. The money went off my account for both transactions basically immediately. I received confirmation of the rental car booking and payment, but on 04/11/2022 I received a cancellation of my flights notice as "payment not received" within minutes of receiving the cancellation notice I received another email informing that my payment had been received but that I now need to book another flight and arrange for transfer of funds to the new booking reference. I did the rebooking as well the transfer request, but on 06/11/2022 I received another cancellation of my flights notice as "payment not received"! I cannot seem to raise a query on the travelstart website as my booking deference(s) are invalid because they are no longer active. I am a first time customer of Travelstart and have had the worst experience - I now left wondering if I should request a refund (how long will it take to get that back?) or try attempt a 3td time to book the flights....but would likely have to pay more in again as the flight prices change and the whole circus starts again.