O2 Sensor problems of the 2012 Ford Focus

While sitting still my gas hand went from 1/2 a tank of gas to the full mark. Filled it up even though the gas hand was on full mark. It took $20 to fill it up and for it to kick off. Then when I started to start my car I hand to turn the key twice to get the motor started and then after I took my hand off the key it kept on cranking as if trying to start although it was already running. I drove it to lexington and could feel it revving the motor up without me doing anything. I turned around and drove back to frankfort and took it to big o's. They put a handheld tester on it and said it was either the oxygen sensor or converter for the engine light that was on. I informed them that I had replaced the O2 sensor just 3 weeks ago. He test drove it and said it revved up on him also which he said something was going wrong in the transmission. When I left from there the lights came on by themselves, the check engine light was on, and the gas hand was still past the full mark. On 9/7/2018 although it said the tank was full my fuel light came on. It also quit on me on 9/7/2018 going down a hill and I had to pull over for a while before it would start back up so I could get home. There was a recall on the tcm valve which has been replaced twice and the clutches in the transmission which has been replaced twice.