Comment by ascorbic

Did you pay for the software? Do you have a contract? No? Then they owe you literally nothing. You are lucky that they give it to you for free. You can open issues if you find a bug, and hopefully the maintainers will fix it, or somebody else will. But if they don't, then you are lucky that it's open enough that you can fix it or pay somebody to. But they are under no obligation to do anything.