fraudulent scales

I wanted to sell my scrap and found that their scales were tampered with. They give a higher scrap price to lure people to sell to them, but their scale is rigged. I actually tried to take a picture of my weight, I am a 5.7ft woman weighing 65+kilo and I weighed 35 kilos according to their scale. When I tried to take a photo of my weight the staff kept on jumping on to the scale to confuse the reading. It took me three attempts, and a lot of shouting to get a photo of my weight. This is, in my opinion, fraud and it needs to stop, so please everyone be careful and test their scales.