Business ProfileforWO Stinson & Son Ltd

I bought this house last year July5/2023 and decided to switch to natural gas instead of propane for the simple reason it's much cheaper. I informed Stinson and Son to pick up the rental propane hot water tank and the two propane tanks. The two tanks had a total of 190 litre of propane at the time of the pick up, couple of days later received an invoice from Stinson with the amount to be submitted, 190 litre of propane at 0.20c, $87.60 for the two patio stones, $200.00 for pick up. I called Stinson and asked why I m getting only 0.20c/litre instead of the price I pay for it, their answer was because I canceled my account, this sounded like I'm getting some kind of punishment . I also told them that when I took possession of the property the two patio stones were missing, not under the tanks therefore I should not get charged for them($87.60). Was no positive outcome regarding these matters at the end of the conversation. I'm a single pensioner with a very tight budget, I simply can't afford to give out any amount of money for unreasonable business practices.