There is no contract or statement. Can I still file a report?

Yes, there is. Even if your documents are not complete, you can still file a report first. Gather what you can prepare first. Bank deposit records, attendance records (photos, notes, fingerprints, any of these), company name and address, employer's name, alien registration card. The Health Insurance Qualification Certificate can be obtained directly from Government24 and serves as a document to verify your health insurance enrollment history. Prepare your actual working period along with your bank account details and attendance records. For the evidence you need, ask at 1350.