Canara Bank — Unauthorised deduction of Rs 590/- frequently

Deduction of Rs 590/- on 18/2/21, 26/2/21, 26/3/21, 13/4/21 and on 1/5/21. I didn't check my account statement for the last few months. But luckily I noticed on 2nd May 21 Sunday, I approached the branch on 3/5/21 and asked the manager, but she told me to give one application stating stop ECS, and also no refund for the previous deductions. I gave one application. But today also 590/- is deducted from my account. Please help. I want all my unauthorised money back. Rs.3540/-