More *****ulent activities

So once again Discovery decides to ***** me over once more. I receive an SMS stating that I owe R1500 which is correct, no issues there. BUT now I receive a WhatsApp from them stating I owe R3300. Like how does that make sense. I haven't claimed anything, nor do I have vitality NOTHING. But they decide that the amount I owe isnt enough and want to ***** more money from me. If this isnt *****, then I don't know what is. I will NOT be paying the R3300.. I will ONLY pay the amount that I owe and that was AGREED UPON ON EMAIL.