Thank you for your question. It is concerning when the freezer door will not stay closed. I recommend for you to soften the new gasket up and smooth out the kinks. This is a repair that requires some fore work before replacing the gasket. You could try like you did heating it up with a hair dryer, or you could try warm water or laying the gasket out flat where the sun will heat and smooth out the gasket. I am sorry you seem frustrated but this is the way for all gaskets no matter where the product was made. I am linking you to a repair of a door gasket repair similar to the repair you will need to make,
If you get stuck or have other questions please reply back to this thread.