I have a Payne central air unit. One of the lines are freezing up evry time I turn it on. I was told the freon is fine. Any suggestions?

Check air filter. Make sure blower is working. Who told you the freon as you call it is OK. Did they test the unit?

I have no control over my ac using my thermostat on the wall,the unit outside will not cut off without tripping the breaker,is the thermostat bad

Jammin my first guess would be a welded contactor. You may want to start your own post to get better answers.