Elocution lessons don't make you speak like that. No one else comes out of stage school sounding like a parody of made in Chelsea. The whole point of stage school is to teach you to be flexible and shit, so you can act and take of characters.
Shame the fakey character is so woefully misjudged. She's probably a perfectly nice girl who simply doesn't gave a clue and needs lessons in not alienating everyone with shit like this.