Mahanagar Telephone Nigam [MTNL] — Outgoing call details

Address:

Mumbai City, Maharashtra

I want all outgoing call details of my telephone no. 28890786, CA no. [protected] for the period 1.3.17 to 31 .3.17 .. From last month i am getting exorbitant bill amount. This month chargeable calls are 608 among which there are only 33 std calls. Hence i wanted to know the details of outgoing calls so that i will know who is using our landline without my information.