Wow, by the sounds of it all you are in big trouble if you don't do the right thing.
I'm scared of trying it myself after hearing all this.
"Don't do this, don't do that, make sure you do this, if you don't sound professional they won't like you......"
PPL pilots take note - ATC is not a big bad monster. They are here to help and assist - as YOU must do when given a direction.
I have always found UK ATC extremely helpful.
