DISAPPOINTED!!!!!!!!!!!

I ordered online on Thursday and I received an email to say it has been successfully placed. I ordered items that were on special. On Sunday I get a text message at 6am in the morning to say payment order has failed, login to your account & update card details by 8am today. I only woke up at 8.30am. Try to go online to fix the payment problem they tell me my order has been cancelled. I try to re-order and the items are no longer on special. I call customer care they tell me there is nothing they can do as Mulbarton Pick n Pay was busy with my order at 6. They were suppose to be customer care service but did not assist me at all. I am very disappointed with the way their online service works.