If you have been travelling during the GG missery you may have a chance by referring to this. My wife was due to be downgraded to Silver (missing 60 points) and got this encouraging e-mail

Dear Mrs xxx
We recognise that the service we have provided recently has not met the
standards that you would expect from British Airways. In recognition of this,
and to reassure you of our commitment to providing the very best service, I
would like to offer you Gold tier membership for a further year.

As I am sure you are aware, the renewal threshold for Gold is 800 Tier Points,
and we hope you will be able to reach this level next year.

We will be sending your new Gold Card to you in the next 28 days.

Yours sincerely


Martin George
Commercial Director


So give it a chance.