A game against computer

I was playing against computer recently (as black) and I reached this position.

I am a pawn up in material but that does not seem to be useful at this point.

I could not think what should I play after this to win.Is this game even winnable from this position?Problem with playing against computer is that you cannot offer a draw.You have to keep playing until a result comes out.

What do you guyz think about this position.

What should have been best move for me?

Thanks

I would probably go to Nf4 to stop the pawn from being pushed and providing open diagonals for white's bishop. Maybe try to put a rook on the c-file with moving the pawn to f6 and freeing the bishop.

Seems that with all the higher rated players on here, somebody would have the nerve to give you some advice.