Hi there! For the best help determining why your toilet flush isn't stopping, let's narrow down the possible causes. Often it's a problem with the flush valve or float not shutting the water off at the right time. Before spending money on repairs or replacements, I'd first try simpl things like cleaning any debris from the flush parts and checking that the flush arm can move freely. If that doesn't work, a quick search on PriceCheck comparing replacement parts could help pinpoint what needs fixing or upgrading. Don't worry though - most problems are simple to fix. With a little troubleshooting, I'm sure we can get your toilet working well again in no time! Let me know if a search for any parts would be helpful.