Resignation without notice : amount recoverable

I have left my last organization without serving notice period of 90 days. Now the organization is claiming the dues for 90 days. But they are also considering benefits extended to me (medical bill reimbursements, transport reimbursements and mobile bill reimbursememts) in the dues. Now, logically I have not received those benefits, so how am I entitled to pay those back to the organization. Need help in understanding.