Where to show security deposit received from mtnl

Dear friends and respected seniors,
                    We had taken mtnl landline connection many years back and at that time they had taken security deposit of Rs. 3000.  In FY 18-19 we closed MTNL landline connection and after two months we got the check of Rs 2216. ( Rs 3000 minus last bill of Rs 784 ). 
 Now my query is how will this Rs 2216 be treated ?  Will it be added to income ? 
Awaiting your reply. 
Thank you.