Willy's Roll-Offs

My project manager rent a 20 yard box from this company and I thought it was not big enough and phoned to exchange a 30 yard box. I had some waste in it and planed to move to the new box but they showed while I was away and then charged me full price the box to be exchanged. To my surprise, their 30 yard box come with some garbage. I phoned them several times, they refuse to refund. When they took away the 30 yard box, they charged me extra 150 saying it has more weight. The box was not even full and I had a lot of foams in it. When they weigh it, I was not there. They can say whatever weight it has. Also, I heard from my project manager, they always get more money in this way. Basically, I gave them my credit card number, they just freely charge whatever they want. This company should be banned from practice at all!