Hello. I have had a new Wirquin dual flush toilet installed less than 8 months ago when the push-button broke and was replaced with an original replacement, which has again broken at the bottom pushing the springs out. I'm getting fed up with this push-button so was thinking if there is a way to convert the buttons to a lever/handle?? Or is there a better quality/more sturdier button which can fit the Wirquin cistern? Thanks.