We may have found other answers which could help you.
Click here for Large Button SmallToilet keeps filling?
armitage shanks Tiffany cistern side lever (plastic)?
Foghorn effect when toilet is flushed how do I stop it?
Can limescale build up around the rim ruin a toilet?
how do I replace a toilet siphon?
how do I get the top off my dual flush armatige shanks toilet?