Pursuant to Code of Civil Procedure 1008, the motion for reconsideration must be made within 10 days of written notice of the order, and upon changed facts.
When the clerk refuses to file declarations and exhibits, it is incumbent on the party to follow up and fix the errors as soon as possible. The materials in those declarations will not constitute "changed facts" upon which a motion for reconsideration can be brought.
If the motion was denied on procedural matters such as jurisdiction and service, it may be possible to start the process over again and obtain a ruling on the merits. I would strongly advise you to invest the necessary funds in obtaining a lawyer's assistance, to minimize the chances of finding yourself in a similar situation, and to get a third-party analysis of your chances of success.