Bought a game on Steam and never received a produc...

Bought a game on Steam and never received a product key. Steam said it was an issue the Microsoft team was working to resolve. Tried to call microsoft and got put on hold for 20 min only to be told that microsoft doesn't take responsibility for games sold through 3rd part retailers even though something like 90% of pc games are sold through Steam. Stuck with an unusable game from a company that dodges responsibility but will still do anything to take a cut.