Front Seat Heater/cooler problems of the 2007 Honda Accord

2007 Honda Accord lx. Delivery taken in December 2006. Front driver's seat has become extremely uncomfortable to sit in and drive. Lumbar support "wings" are extremely hard causing severe pain and numbness in my lower back (pain and numbness last for a time after I get out of car) if I sit and drive over 15 minutes. I visited dealership, told nothing they could do and to buy a lumbar roll for my seat. Came home and called customer service and I was informed that "a tech says" the foam can in fact become very hard under cold weather conditions as being experienced in massachusetts in 2007. Was told to go out and buy a lumbar support pillow that inflates and put it in car only when I drive and run the heater before I get in for a while. Problem should disappear when weather warms up, but will continue during cold weather. This is totally unacceptable, car cannot be garaged to protect against cold weather. How can I drive this car in the future winters with this existing problem?.