Damelin Correspondence College [DCC] review: issuing of results and certificate

My student number is 421977, i completed a course in Diploma:Management in December 2016 however till to date i have not yet received any letter confirming the completion of my course. I've been calling the college to make inquiries regarding my diploma but till to date, i have not been assisted. I have spoken to a number of the college's consultants whom say say a different story whenever I make a call to inquire. This is now becoming a frustration and it's jeopardizing my chances of being employed. I would appreciate if this matter could be escalated to the relevant people and at the end i receive my qualification which i paid so much for.