Company doesn't have legal obligation to not lie (in most industries anyway).

However everything we humans do has moral implications, and company that lies is clearly behaving in immoral way. Then it's up to a customer to decide based on her morals what is the right approach to dealing with such company.

A company can't be immoral, no more than an axe can be immoral.

Can a machine that eats babies, whose owner isn't really interested in it one way or another but does happen to recall that it was left switched on in a public place, be immoral?

no

axes aren't made out of people, unlike companies.

Companies are not some organic-made-out-of-people creatures. Where did you get that idea? Seriously, why do you think that?

think what? of course company's registration certificate and brand name cannot be immoral (unless registration states "we kill people" and brand name is something like Murder-by-Order"). things are not what makes companies, are they?

A company has no feelings, no concept of regret or remorse, it simply lacks consciousness. Without this you cannot have morality. A chair, an action, not even an animal can be moral or immoral.

you still don't understand that by company I mean people it consists of?

Oh please. You can't just make up your own definitions of words and then use those definitions in discussions. There is a definition of what a company is, and it's not 'people it consists of'. The wikipedia article about Company is actually quite correct.