Bank Of India — my boi account with number [protected] has been debited rs 87424 without any prior intimation

Address:

847427

An amount of rs 87424 was debited from my account instead of credit without any prior intimation on november 30 2017
Instead that amount had to be credited
Kindly sort this out right now otherwise i will persue this legally.
When i asked for clarification no response has come from the bank
How can you take away my money without taking my permission
Their customer service numbers are also not attending any calls
Brach people also is very reluctant to help
I need my money that will have to be back