The short answer: A rejection is usually a fixable packaging problem, and the reason sits in a short list: missing apostille, an informal translation, a name mismatch, or a document past the bank's freshness window. The main caveat: resubmitting the same documents with an explanation rarely works — the file has to come back rebuilt to the bank's written requirements.
This situation usually means the underlying facts were fine and the presentation failed. Banks evaluate against an internal checklist, and a document that is genuine, official, and still outside the checklist gets refused. The route forward starts with getting the bank's actual requirement list in writing and rebuilding against it.