You got conned by an unscrupulous sim center. That's never happened before
To get an FAA type rating you must complete an approved course in the type; take an oral exam or equivalent; then take a type ride with a designated examiner/TCE or the FAA.
What I would do if I were you is complain very loudly to the sim center. Then force them to reduce the cost of any proposed type rating course by the amount that you have already spent.
FAA orals are not easy as compared to European multiple choice system exams so make sure to study diligently for it.
Typhoonpilot