How can i fix my toilet ?

I have one of those silly push button flushes that wouldnt come bck up after flushing it so i took the lid off carefully coz it said the button was fixed to the mechanism inside. now the button doesnt work at all but the bit that the button presses i am able to press down on to flush the toilet but it is just sitting over the top of my cistern and dosent look too nice how can i fix this! x