Mancosa will hold you back

I have been trying to get Mancosa to send me my statement so I can start paying back my fees in order to get my qualification but each time I request it, they send me an attachment I can not open not with the student number nor my ID number and every time I raise this issue with them, I am either ignored or resent the same attachment I can not open for over 2 years now. I don't know what to do anymore to get them to send this statement so I can pay and get my certificate. I am so disappointed with them.