Intellicell unauthorized deduction 6 months after cancelled and paid up contract

July 2024 I cancelled my contract, paid it up, received confirmation that it us paid up and settled and the debicheck is deactivated on their system. Last night, 25Jan25, 6 months later, they suddenly deduct money out of the blue. I called the call center and spoke to customer care, very unfriendly and they put the phone down in my ear when I queried the incorrect unauthorized payment last night. Really? You do the right thing and follow the cancelation process, pay religiously and settle the account, and they treat you like ****. How amd I now going to get my money back? How do I kniw they won't deduct next month again?