I made the same experience: after uploading the assignment (in addition to mailing it) and taking the exam at the beginning of may, nothing happened for 9 weeks. I wrote several emails. The response:
Can you please confirm the date you have completed the assignment and essay. Have you uploaded it on Certmanager or mailed it to us, please confirm.
What a question! Still no results after my confirmation. That is frustrating! I am going to bring an action against them, if I dont get a result at the end of the month.