KULULA ********** DEBIT

I've noticed on a semi dormant business account that Kulula are attempting to debit me about R 1 500 each month. Fortunately I don't keep enough money in the account and so it bounces, costing me R 120 each month. How did you get my account details and why can't I find and email address to contact you regarding this? And why on earth would Kulula debit an account when I don't do any business with them?