So you didn't find the code for the safe, and didn't find the right phone number to call. You have to use the pills (use them in your inventory) in every room and see what is changed. In the bedroom, the phone directory is changed, presenting you with the hint for the safe password. As for the phone, a message is revealed on the shower door after you take shower, and this is a hint for the phone number (the phone keyboard contains characters in addition to digits). It's also notable that it starts with the exclamation mark.