I want this *** closed!!

I called woolworths call centre yesterday for a settlement amount. I was given the amount and told to pay it in store and once I've done that...to contact the call centre again to close the ***. I made the payment yesterday. Called in today and was told the *** cannot be closed due to an overpayment of 70cents!!! This needs to be escalated to the Finance Team who doesn't work on a weekend. I need to call back in 4 days...ND oh if there's any additional charges..I am liable for it. Are you serious? I would like someone to contact me and have this *** closed ASAP. I will not be making any further payments to this ***