This sounds pretty angry.
I'm willing to bet that LMI is not the only company that says "sorry, you already paid, signed, etc. We can't give you your money back".
I'm also willing to bet that after that, they tried to see what they could do and accidentally set you up with a trial.
That being said, I've never dealt with Sales support, only Technical support, who have always been awesome and even when I'm not really satisfied with the answer, it's the "right" answer. I'm just mad because I want my way and I can't get it (remind you of anyone...?).
*edit* Sorry for your financial hardship. It can be very difficult to get through and you kind of take on that "what can I get out of the world that it owes me" concept until you get back on your feet. Rest assured that unless you start yelling at the teller at the bank about how they can't charge you monthly fees because you wanted to close your account last week but you were "too busy" to come in and do it then, no one will think less of you for trying to squeeze those extra pennies out when you really needed it. In my opinion, why LMI is within their rights and this does not in any detract from the "business as usual" stuff, I am disheartened to hear that they were unwilling to help you out in your time of need.
I do feel the need to ask, though, how you would feel if you sold/leased someone something, they paid you, the money was "already spent", and they came back begging for the money, saying they don't need the item anymore. Sure you'd feel bad that they need the money or whatever, but if you "don't have it anymore" what are you to do? Take it off your next paycheque? What if 5 people return their item? How much do you have to lose out of pocket before you start telling everyone blanketly "no, you paid for it, you keep it!".