Plagiarism for investigation- no feedback given

I reported a case of plagiarism by an MBL UNISA student and was initially assured that the matter would be investigated and that I would be contacted for more information if required. Upon following up, I was told that i made the allegation without sufficient substantiation.<br> I responded by sending through several documents backing up my allegation, and specifically mentioned my concern that my confidential work information might have been submitted as a MBL thesis proposal. <br> At the very least, I expected some investigation into the matter, and assurance that my confidential work would be removed from MBL records since I am not an MBL student.<br> Initial report of the potential plagiarism was 22 Feb 2016; followed up with documents, etc. on 01 March 2016. To date I have not had any feedback.