Millennium Metals

My dad passed away and being a hoarder his home was overrun with lots of car parts,tyres etc. So the family got together and started a clean up. As the tyres cost money to dispose of we decided to get scrap metal bins to dispose of the metals and at the same time make money to pay to have the tyres disposed of. We used a company who were great. They dropped off a bin, we filled it,they took it and paid us a fair sum for it. When we needed another bin we rang them again but unfortunately they had no bins available so we decided to use this company. 2 weeks passed and we still had received no money so my brother in law rang and was told they received 4 and a half tonnes of metal but the paperwork said we were not to be paid. So my brother in law went directly to them to speak to someone in person but there gates were locked. So he rang there number to get someone to come out and speak to him. After a hostile conversation someone was sent out to explain that for some reason they were not going to pay us because the paperwork said we were not to be paid. Subsequently further phone calls have resulted in them saying we did not have enough metal to cover costs. This is clearly a lie since we didn't have much more in the last one and we made over $400. Actually closer to $500. The lady, I use this term loosely, claimed we must have had light metals but much of the metal was car engines or car parts etc, hardly light material. Does this sound fair to anyone?