There is no way to debug this without seeing code and data. There is either a query issue or a data issue to explain why the data is not showing. Regarding the second question, what have you tried so far? People who help you here do it because they like to help. If you need custom work done, several members are willing to take paid work.
Please upload the database and tell us how to open the query in question so we don't have to muddle through bunches of objects.