BA COVID INTERNATIONAL REFUND

We made an international travel booking through Discovery Vitality. Our travel was delayed due to Covid. We opted for vouchers which was issued and valid till end September 2023. Tried to re-book and was told by British Airways the vouchers cannot be used anymore and we must apply for a refund through Discovery. After about 3 hours calling the one number after the other, I was informed that we will have to be added on the "British Airways Refund List" with no turnaround time available. Seems they have not even started paying out refunds. All email correspondence for the last couple of years clearly stated we are not eligible for a refund and must use vouchers. BA makes it Discovery's problem and Discovery as the "middle man" makes it mine.