Pathetic Service

I have a Woolworths account and pay more that is exspected on my my Woolworths account.I receive 10-12 calls a day from Woolworths saying i am overdue.I even get a sms.How can i be going over my limit if i am paying more than what is supposed to be paid every month.I called their collections department spoke to Lucinda who could not assist me.Was then transferred to customer services and assisted by Beatrice who cannot answer my question. This is totally unacceptable to be receiving 10-12 calls a day.Luncinda told me i am not the only customer complaining and she will escalate it to a manager.So did Beatrice explain this will be escalated.I will take this further with Credit Ombudsman and NCR should this not be sorted out.