Incorrect Items captured on my Invoice

Customers should be very careful purchasing Goods from the Pinehaven Build It Branch in Krugersdorp. I encountered for a 2nd time a problem with a Person placing my order. Obviously there is a problem wrt Training their staff. However it seems they do not care as management of this store. It is clear if you request Building Sand pre mix and or Concrete pre mix, i.e. 40 KG bag. I requested a Building mix this morning. On the Invoice it partially indicated Building. According to the manager it is for Concrete which was a surprise to me. I will never purchase any goods in future from this store no matter how far I need to drive to Chamberlains or Builders Warehouse.