2 Years after Cancelling received an Account

2 Years ago i telephonically (as Autopage requests) Cancelled my contract. One year later Debit orders will still being deducted on my account, a different amount every month. Not even my debit order amount I used to pay. Couldn't even stop it at the bank because of the difference in amounts every month. Phoned again just to hear that there was no Cancellation on the system .Cancelled Again! ! Debit orders stopped the month therafter. Never heard anything from Autopage ever again. This afternoon Select Online Credit Recovery phones me saying that I OWE Autopage R1978.68!!! When I phoned Autopage they apparently didnt have a cancellation on the system???? Eventhough debit orders stopped. Now the want proof of cancellation, which is a number they give you over the phone. I dont keep numbers for a year in my wallet. They recon I dont have proof that i Cancelled. Select online now gives me 20 days to pay or i will be handed over to the Credit Bureau. I cant even remember the cell number the contract was on. I am sick of Autopage. And now they want to make me the guilty party.