My Account is settled sort it out NOW

Edgars debt recovery is the worst, they actually want to milk money from us poor South Africans. I had settled my account in full last year May 2016. Until today am still receiving call from their debt recovery call daly something, they calling from Durban with the following numbers ********** 788, call from this one the agent picked up that I had settled my account so the hundred and couple of rand he said I owed was not valid and he promised to update the system. 24 hours later I receive a call from ********** 788 and this one says I owe 204 and some rand, I deputes it he gets defensive to say he's call from a different company. Can Edcon sort this out before I escalate to Consumer Protection, you have *********** customer, I am not going to let you do the same to me just like you did with the club fees.