orange connection

Customer Care
I had an orange connection which was taken in 2004 from Mumbai which later on changed to vodafone. The cel no was +xxxxxxxxxx. I relocated to Muscat in Jul 2008 after clearing all dues and had not been using that no since then. I have misplaced the sim card. Please let me know how to terminate the connection and the procedure to clear dues if there are any. During my short trips to Kerala, I had approached many vodafone offices, but they have not resolved the issue todate.