@saniali
The timeframe for reply is within 30 days after the request is received. So 'received date' in your case could be different from the date when you mailed it.
Did you mail your request at the address below??
If you don't hear anything by 'due date', I guess you can contact the co-ordinator. Her contact information is:
Citizenship and Immigration Canada
Patrice Bériault
A/Access to Information and Privacy Coordinator
Access to Information and Privacy Division
Ottawa, Ontario K1A 1L1
Telephone: 1-800-667-6703
Facsimile: 613-957-6517
ATIP-AIPRP@cic.gc.ca