Fidelity ADT

I canceled my contract with ADT after being with them for years, due to affordability. I gave them a month's notice as their contract stipulates. They keep debiting my bank account, months after I canceled. I've sent emails, made numerous phone calls, went to their offices in Emalahleni a number of times and they always make false promises that they will stop debiting my account. To this day they are still deducting money from my account. They've ruined my credit score. I am very disgusted with their service. This is just ****************. Do not ever trust them, they're ******!