DALY CORP TRYING TO MILK CLIENTS OF MONEY

I am so upset with Daly Corp. I received an e-mail saying my woolwoths account balance is +/-R1200.00 then i went to the store and paid R1000.00 then the amount turned to +/- R400 so i went to the store and paid R430.00. Then the lady tells me i owe R65.00 i was shocked. then today i get a call saying balance is +/- R250.00.Someone pls tell me how did it jump from R65.00 to R250.00 in 28 days. I am not willing to pay and pay with no end and no explanation and no statement. Its not as if i didnt pay, i paid R430.00 so I dont understand what Im being charged for. What upsets me is that i actually picked up the fone and called Daly's offices to say I will go to Woolworths when i have a chance, pls do not hold me to pay this month as i already paid R430.00 because i expected them to add unneccesary interest just like they did. I actually called to say take out that note you put in your system and stop sms'ing me. when i went to the store and ask for the balance they cant tell me, so i pay R430 trying to remember the mail. then a lady said R65.00 left. now its +/- R200. wats wrong guys. why are you trying to make me pay forever. I refuse to pay R200.00