how to get rid of fkin beta?

betfair was really great 10 years ago
but it`s a general rule in life that everything good must be ****
after a while
ffs

I clicked "opt out" but it still loads up the beta version every time I change a page, so it appears you can't actually opt out of it.

Are you also a member of betfair feedback community (I'm thinking they may have targeted us to try out beta).