TELKOM NUMEROUS DEBITS AFTER PAYING OFF THE CELLPHONE CONTRACT

Dear Hellopeter, please note that i have requested Telkom to cancel my contract with account number ***, They still have not, they have changed dates to debiting when they know i do not have sufficient funds in my account to incur interests every month, they have blocked their services, i do not get airtime nor data, but yet there is a R300 amount that keeps incurring every month. I have been to store to cancel the insurance as i so not need it anymore they refused and gave me a number to text to this day no one has gotten back to me. i have finished paying for the phone but yet i am being debited money i do not know what its for because there's no services that are rendered. They say they can only cancel when my account is in good standing, how will it be in good standing when i am being charged money i have no idea what its for? please assist.