How Do I Fix My Kohler Toilet?

I just replace the rubber flap in the tank and it does not stop running in the tank seems like it does not want to stop filling

Kohler toilet k338-4ca keeps running

Get a Gold Kohler special Representatives to speak with you in person.

I have recently purchased a Kohler toilet and I find that the wall of the bowl is not clean after flushing. It seems that that there is not enough water retained in the bowl after flushing..

Thank you