*******! Mango cancels flights and refuses to refund or issue a voucher

Please find attached details of a flight booked with Mango Airlines – booking reference TVJBKL. This flight was delayed twice and thereafter cancelled by Mango Airlines. On 29 April 2021 (the day the flight had been cancelled) we had received communication that Mango Airlines will contact us with further information. To date, we have not received any further communication from Mango Airlines. We had subsequently emailed the Refunds department requesting a refund. We had received a response that no refunds are possible, even though their terms and conditions on the website state that "Mango Airlines will process a full refund if the flights are cancelled by Mango Airlines… any refunds will be made either to the Guest named in the ticket or the person who has paid for the Ticket, upon presentation of satisfactory proof of such payment.". Despite this and in order to resolve this matter quickly we had requested a voucher, as suggested by the refunds team. Emails have been sent to the Vouchers Department every two weeks since April and to date we have not received a response. Please assist as a matter of urgency