I find these sort of posts strange, in the extreme.
If I had a genuine gripe with the club, or anyone else, I am not sure this would be the place I would post it, where comments are expected, if no invited - I wouldn't go onto a public forum and make a post in the dead of night, then presumably go to bed, meaning I can't defend myself against the inevitable flack, or explain further the situation.
Because of this, I along with others, tend to smell a rat - which is very unfortunate if totally true!
With you on this. We know very few facts. I could understand someone not noticing a small difference but not a £400 plus one in what they were being charged.