Purchased items missing

On the evening of 30/07/2015 at 18h29 I purchased and paid for about 19 items from the Liberty Midlands Mall Pick 'n Pay store. On arriving home, I realised that most of the items (far more than 1/2) had not been in my trolley when I left the store. Since the store had closed by then, I notified the store early the following morning. <br> <br> I communicated with Customer Service who (after a few conversations) informed me there were no items handed it and promised to look at the video of the till and let me know what had happened. I have written (on their website) to alert them about awaiting a response. To date I have not heard hat happened to the items I purchased. I admit I should have been more vigilant. However, I would still like to know what happened to more than a basketful of my groceries.