Debited WITHOUT my consent, AFTER confirming cancelation!!!

Yoh! This company sucks at communication. I have been sending emails, but they don't respond to them. They don't care. I canceled my policy, they confirmed the cancelation (including the notice period). Immediately after confirmation of the cancellation, I received welcome emails and texts. I sent numerous emails informing them about this and they just BLATANTLY IGNORED ALL my emails. They then proceeded to debit my bank account WITHOUT MY PERMISSION!!!