Bajaj Finance — Debited 117 from my account without any due-purchase

Address:

chennai

Bajaj finance debited amount of 117 from my account on November 2022.
Whereas i have no due and did not purchase after 2021 November. for that 2021 loan they already debited RS- 117 for ecs mandate on the very day I purchased a product. ... I m never a defaulter and has been using Bajaj finance.
Why is the charge deducted ?? Also how SBI just letting them to debit the amount without my permission. how long my signature is valid.
I am very much disappointed with SBI not helping us to this question.