Mango Not Fulfilling Cancelled Flight Voucher

I had a flight booked that ended up being cancelled due to the covid-19 lockdown restrictions on flights. I contacted Mango airlines to ask how this would be managed and received a timely response from Kaygee at guestcare saying that I would receive a voucher for the flight.

It has now been 5 months and I am yet to receive one despite numerous attempts to follow up.

I was understanding that it was a complicated, busy time for Mango during the pandemic but it is now bordering on ridiculous. I spent a lot of money on a flight that was unfulfilled and I would like a refund or a voucher.