They deducted my money ev after cancelation period

on the 15th of January 2015,I called the company to cancel my tracker account with them.customer agent explained to me that it will take 20 days for my tracker to be cancelled and I did not have a problem with that, their debit order went through on the 16th of January. Their 20 days period lapsed on the 12th of February 2015 But to my surprise they continued deducting my money even after their period had lapsed (on the 16th of Feb their DEBIT order still went through).I called the customer service to explain my predicament//worry/complained and I spoke to a lady by the name of Mercy who said their debit order system was already activated to take the money so there is no way it could have been stopped. Like really is that possible? their system must be activated in such a way that it knows when to stop,be aligned to their waiting periods or any other periods that they have.This companies must not ******* their clients, they need to be stopped, we all need each other.how am I gonna go back for their services after buying another car? I will not, not even recommend them to pp. I will also report this to Consumer Rights commission. this cannot be tolerated, CAN THEY REFUND ME MY R118.