I recently had a new bathroom put in and the temperature control has broken. I accidentally rotated the control post it's furthest point and now it just rotated post the pin it is supposed to be attached to. I'm guessing it's come off it's thread. Is there anything I can do to fix this? There's a picture in the link attached of the type I bought. Any more information required just let me know.
https://www.victorianplumbing.co.uk/milan-triple-square-concealed-thermostatic-shower-valve-chrome