Delivery Complaint

I placed 3 orders which were supposed to be delivered from around 1pm to 5pm, paying R45 for each delivery. I received 3 separate notifications for each order that the driver is on his way, all within the timeslots I had picked. Orders were not delivered at the times they were supposed to have been delivered. Instead all 3 orders were delivered simultaneously at 18:44. So I was charged R135 for delivery as they made it all as one batch!!! Then I discovered that the margarine I had purchased with the 1st order had discolored due to melting. Seemingly, the 1st order was done and put aside to be added to my other orders so that they can all be delivered together in one go. Clearly my items were left in a "car" all those hours hence the margarine even melted. I paid delivery charge on each order and I expected these items to have been delivered separately at the times I picked. Now I paid R135 for one delivery batch. What a *******