You can try the following methods:

1. Re-download the report: You can try to re-download the report before the report download period expires. Sometimes, the report download may fail due to network problems or other reasons, and re-downloading may solve the problem.

2. Contact Amazon Customer Service: If you have tried to re-download the report several times and still cannot download it successfully, you can contact Amazon Customer Service to report the problem to them and ask for help.

3. Analyze historical data: Even if you cannot download the latest report, you can still analyze historical data to understand the performance of your advertising campaigns. You can use historical data to optimize advertising campaigns and improve advertising ROI.

4. Contact the Amazon Advertising Support Team: If you still cannot solve the problem, you can contact the Amazon Advertising Support Team to report the problem to them and ask for help. They can help you solve any problems related to advertising reports.

In short, if your Amazon Advertising report has exceeded the download period, you can try to re-download the report, contact Amazon Customer Service, analyze historical data, or contact the Amazon Advertising Support Team to solve the problem.