I just had a similar experience with a well know ATV/Dirbike online parts supplier. I had fight with this company over a coupon/cash voucher I received as a gift for ordering allot of products from this company. I recently went to place an order and figured I would use the coupon and found it expired. I sent a few emails and asked the company why they sent me a cash voucher that expired two months after I received it? I was completely honest and told them I had no idea that it expired, I mean I would figure it should never expire, or at least give me a year to use it. So I told them that I would never buy from them again if they did not honor the coupon and they said sorry, It is expired and we can not honor it. So I wrote back and said fine, you just lost a good customer. Now this coupon was clearly marked that is expired two months from the date of issue, so it is my fault, but considering that I called them on it and I have placed many orders from them, that they would have issued me a new coupon or something, I mean is a coupon worth losing a customer that buys from your site on a regular basis?, they seem to think not. It is not allot of money, like $50 bucks, but it is the point and when you are ridding a Banshee, every bit of money helps!!
I would love to drop their name, but It is my fault for not reading the fine print, so I will keep it to myself. I will now only deal with Banshee HQ sponsors.