British Airways complaint: I need a voucher extenstion period

Dear British Airways,

I have an e-voucher from a covid period ticket that was canceled and I see that I can pay or part-pay for flights that depart and return by 30 September 2023.
I also have 1,514 that should expire in a month.
Flight details: BA0885 of British Airways on the 2020-03-20.
At that time I didn’t know that if I take a voucher I am no longer entitled to receive a refund if the flight was cancelled, so I took the voucher, but was never able to use it.

At this moment in being sick, I have a disease that doesn’t allow me to travel for some time, I would say the whole year 2023, but it depends of course on how the disease will evolve. Please see attached the medical leave that I had.

I would kindly ask you to extend both my Avios and the voucher until the middle of 2024.
I know I have this voucher for a long time and I have tried to use it so many times but you know you have restricted a lot of flights and also the prices were double or triple versus when I bought, so I couldn’t afford to make the same trip I’ve planned; even in this circumstances I’ve tried to go lower and just buy something, but except going to London where your hub is all other trips were unattainable.

Best regards,
Lia Marinescu
4915155184069