State Bank Of India [SBI] — fast tag debited money double

Website:

Sbi fast tag

My fast tag is not working properly was said by toll plaza boy. He took cash from me. I have the receipt of 90 rs. And also fast tag debited the same amount 90 rs from my account.

Most of the time the scanner is not working properly and we have to face problems for that.

Now, i want my double debited money back in my account.
Please help me out for this.