Complaint Review: Thomson education direct

I took their class and when I finished they said I owe the balance and they were holding my certificate. I paid the balance and never received anything showing I took the class it’s been 15 years and I still have no proof that I took the class and now when I call the class I took they don’t offer anymore and they have no record of me being a student so basically They took my money and I wasted a year on a class that won’t do me any good because I have no proof that I ever took it or completed it