Advice that must be enforced is no longer just advice.

You were lied to by Cameron,

It was not a lie if it was believed to be true.
And, it was not just Cameron. The entire ruling establishment including all the political parties were complicit.
Despite what you say, no-one doubted or challenged it until the result, and then it was private individuals not politicians who made the challenge.

Parliament was not to be consulted.
That is what the legal case is about, and despite your assertions, it has yet to be settled.