Carrier/rack problems of the 2005 Honda Civic Hybrid

In 2007 a Honda dealership conducted upgrades to my 2005 Honda Civic Hybrid computer system without my consent. It was in the dealership for recall notices. Immediately my gas milage went from 52mpg to 26mpg. The dealership refused to correct the problem. The dealership said the upgrade to the computer system should not have diminished the mpg. 2012 the transmission went out in the car, I got the run around by the dealership on why the transmission went out. I was misdirected by a transmission company that said they could rebuild my transmission. The Honda dealership had to step in to track down issues with the new transmission. Honda refused to accept responsibility for bad transmission parts. 2013 the ima and check engine lights are on. I am unable to register my vehicle due to the ima and check engine light disqualify my car from passing a smog test. The 2007 computer system upgrade caused my ima system to malfunction for years by not holding a charge causing low mpg. Now the ima/battery pack is malfunctioning to the point it has to be replaced. Honda refuses to accept the responsibility of their mistakes and fix my ima system.