I just double checked and found an error in the implementation of the third ending, it should be fixed. Here's a guide if you still need help (Spoilers)
1. Read the paperwork
2. Don't help the IT guy (he's actually not very nice)
3. When looking through consumer data, choose option 3
4. For quality assurance, choose not approved, approved, approved.
5. Watch the frame by frame of the ad campaign.
6. For the production schedule, it's underling work.
7. When contacting the distributor, play along with the innuendo and send a lewd pic.
8. For the shareholder, option 1, option 1, option 2.