Palm Treo 700w / 700wx

OK, I am really tired of trying to get Sprint to admit that my home area is just not covered good enough. I have the Palm Treo 700wx and I mostly have one bar and sometimes none. I drop lots of calls and so does my wife. She has a RAZR. When one of us travels to another city, it's worse. My contract with Sprint is up in November. Sprint's answer is I need to purchase two new phones and sign a new contract. What a load of crap! I purchased a cheap AT&T phone to see if the reception was any better and it is! How can I get Sprint to let me go 3 months early without paying anything? I want to walk away, but they keep giving me such lousy customer service that I just feel like being their worst nightmare customer now. I really don't want to be the "problem customer", but I feel I deserve service that works and does what I pay for. Right now, it does not and Sprint is refusing to admit this, like its somehow my fault that neither phone has service at our home. We live in the city limits and we do not have a metal roof or anything electrical that would interfere with signals around us. How do we get released?