given alot of machinations these days u could be sympathised with but dear please dont be too hasty in drawing conclusions when you do not know the facts.
If u were invited for the exam you would have known that the Petrobloc is not the name of the company but ONC. OWHE EFE NIG CO.
AND IT IS ONLY A CONSULTING OUTFIT. they didnt collect money at the test venue but only an underkaten to remit 25 percent of ur first paycheck on been succesful a job procurement.