Tata Docomo — recharge activation rs 160 on [protected]

Address:

Mumbai City, Maharashtra, 400093

Number [protected] registered under my wife shobha dubey
I recharged above number with rs 160 on 28th november
Got the confirmation from docomo as well as the google pay
Same evening i called some relative
To my horror balance showed rs 5 instead of 165
Immediately after that i mailed to listen and mum. Nodal
Even after a week follow up repeatedly i am getting same reply from docomo that 160 was added to my accounts
I am simply speechless in 30 mins where did 160 got used as the call duration was only a minute
Docomo is not giving any satisfactory answer
Please help and revert my 160 back to my accounts
Hope it doesn't take a week to understand if money added to my accounts and where it has been used