Cancelled 14 months ago... still debiting my account!

I need answer on this urgently:

Sanlam continue to debit my bank account with over R2k a month, despite me cancelling my policy in writing in November 2022!

Do the math and that's well over R20k to date and still no end in sight!

And, they won't even look at it until I provide 14 bank statements. Surely that's an invasion of my privacy, when I've copied each and every line off the bank statement, with all the supporting dates, codes and amounts.