A while back the A key broke off revealing a little nipple looking thing, i continued to use it like that for a few months, and then the rubber piece broke off, revealing just a small flat pad. It was still able to be pressed so i continued to use it for many more months.

Yesterday, all of a sudden the key started getting stuck pressed, sometimes for 6 or so extra presses and sometimes more than 30 presses. This is very concerning to me. Is there an easy fix? Is my keyboard ruined? What does a replacement run? Thanks in advance.