Sounds like you live in a tough neighborhood, Jessica. The gas businesses here are geared to make people happy, so they will return year after year. Last trip in, I talked to them about installing a large tank for propane because we are converting to propane stove. Maybe it's just my attitude, but I have never had a problem with propane dealers, and I go out there when they fill the cylinders and make sure I get a ticket for only what they put in. A chimpanzee could read those simple gauges. If you're the trusting type who just takes them in and does very little in the way of monitoring them, then you get what you get.
Steve