I think you're doing great on your own when you post stuff like this:
So far you seem to don't have enough evidence to bring anything against Turbine, much less a lawsuit. All I see are vague suggestions and moaning about not getting your points.
When you bring this suit, I suggest you present evidence that shows:
- Turbine quoting you one price and charging another; e.g. quoting 521 in the shop checkout, then charging you 595 points for it
- Advertising a normal price as a discount price; e.g. 595 as a sale price when the normal price is 595
- Advertising a price that shows a larger discount than it actually is; e.g. 695 > 521, rather than 595 to 521
Then you've got a game! But until then you're just posturing.