i was playing someone a while ago and he used ambush with blades and i called him out saying he can't. Because ambush grants a close combat attack. Blades requires a combat action.

so?

Blades/Claws/Fangs:
When this character is given a close combat action, you may roll a d6 after making a successful attack roll. The result replaces this character’s damage value, then that damage value is locked until the attack resolves.

Ambush:
Choose a character. The character gets +2 to its attack value when it makes a close combat attack while occupying hindering terrain. After the attack resolves, the character's Stealth is countered until the beginning of your next turn.

Notice that Ambush doesn't gives you any kind of action; it simply happens when you're making a close combat attack. Your opponent gives Wolverine (for example) a close combat action and uses Blades/Claws/Fangs. All close combat actions lead to close combat attacks, which is what Ambush applies to, so Wolverine can get +2 to his attack value for the attack. Unfortunately, you were not correct on this one.