Hello newbie here

I have had my audi for 11 years now. never bothered me and has been brilliant but for the last few months the brakes have been giving me real issues.

When i put my foot down the pedal hits the floor then when i let it up it's hard and i can break.
I've bled the brakes new master brake cylinder. Still no better.

It's driving me nuts and if i obviously put it in to a garage i'd be a small fortune(worth more than car)
Any advice would be a great help

regards
Jamie