I want to return the fuel tank. What if the other party doesn't return it?

What is the reason given by the other party? Did you drop the deposit slip? Ordinary gasoline can be refunded as long as you have a deposit slip. You can't return it without a deposit slip. You can't return it if you light the black gas. Therefore, you must order gas from a regular company. At present, there are a lot of black gas posing as regular gas. Therefore, if you want to order gas from WeChat official account or call a regular company, or go directly to the store to order gas, there will be no black gas.