I've always liked it when suppliers change the terms on leased products and devices and then try to buff and push there way around by stating that you agreed to their new terms when you had never done so.
In a similar vein I had several 100 pound cylinders (propane) delivered one fall for a building project, no contract of any kind. We did several cylinder exchanges as the project was going on, then it fell apart as the contractor defaulted. Contacted them to return all the cylinders and was expecting a refund on the still filled ones. They said no refund we will just pick them up, I said I paid for the propane and that they would not be getting it back for free. They put up a fuss and made several threatening calls and letters. As I used up the gas I'd place the cylinder out were it was accessible and call them to pickup the empties. When it got down to just 3 still filled they got real pissey. And I told them when they were empty I'd call and till then stay off the property, they tried to tell me I couldn't do so, Ha. When I called them they didn't come get the empties and after a while they threaten to take me to court for the cylinders and "back rent" per their contract. When they couldn't find and produce a signed contract it got real quite on their end.
That was one reason when we went with propane for new stove I wasn't about to lease or rent a tank as well as locking myself into a single supplier. As the intent was to have a larger supply than just a stove would need I wanted a 1000 gallon tank. I was amazed at how difficult it was to buy a tank. Almost all the vendors wanted to do the complete install including all the piping and didn't want to discuss selling a tank. Because I had a specific install I wanted done for any future uses it was a nightmare.
I ended up hiring a plumber to help me install a 5 valve manifold in the crawl space and run a 1 inch black iron pipe outside to a regulator position, then I took an empty 100 pounder to town and had it filled and brought it back. When we installed the new stove we used one of the valves and connected the 100 pounder up to the system which had been pressure tested, bubble checked and all.
Once that was done it was much different.
As it wasn't a "new" install but just a tank replacement
Once I finally located a local tank supplier that would sell a tank.
With it being a thousand gallon tank we decided (my wife) not to locate were the 100 pounder was but about 50 feet away. The tank company wanted to run the line from the tank to the connection, so I dug a ditch for them and also laid a 4" drain tile in it for them to snake there flex line through. So many rocks that I was quite leery of direct burying the flex line. So they brought the tank, set it, installed the 10 PSI regulator, ran the flex line and installed a new single stage regulator at the piping pipe in place of my two-stage. And they had a truck come up the same day and fill the tank.
So now we have a 1000 gallon tank feeding a kitchen stove and also a recently install gas fireplace insert. replacing my old coal burning insert. With spare ports and valves in case I end up installing a gas water heater or boiler if my oil fired one dies.