I wrote my sob story here: AIMA Portal Error - Can't retrieve Golden Visa Analysis Payment Details - #83 by kipper_tucking0a
Consider yourself lucky that your DUC had an invalid reference number. My DUC had a valid reference number but is a black hole. AIMA now says it’s an invalid DUC and I have to generate a new one. But it ate my payment. Bank says they can’t reverse it. Bank says it’s AIMA’s responsibility to reverse it if their DUC was incorrect.