Billing chaos

On 19 February 2016 I received my eletronic statement indicating that the balance on my account was R29,25 and that I could still spend R470. I am a client of Donna Claire since their opening in Centurion and used to have a credit limit of more than I ever intended to spend. On Saturday 28 February I collected 3 items for purchasing but at the till the sales lady indicated that I need to pay another R249,15 before they will \open\" my account which was for some or other reason \"blocked\". i paid the amount and she phoned Head Office but concluded that my credit limit was only R500 and the 3vitems exceeded the R500.<br> <br> My question: What happened to my credibility? How can the electronic statement shows an outstanding balance (which was payable on 1st of March) but I needed to pay another R249,15 before the items could be placed on my account?<br> <br> i left the shop but Donna Claire lost a loyal client for ever."