Was told to pick up my food

I placed an order through the drive through once the food was given to me in my hand the packet tore open and the food fell out. The women working there was very rude explaining to me that its my fault claiming that i must of hit the packet on my car (this was clearly not the case and any camera around the area can prove this), the manager was called and the manger herself was also absolutely rude telling me to pick up all the food that has messed on the floor after me asking her to do so she told me that she needs me to pick up the food as she needs it to do stock take. These women were both absolutely rude to me and i was not willing to get out of my car to pick up the food that had messed on the floor which was not my fault(not to mention its Louis Botha at almost 23:00 which is not really safe at all) in my opion as i saw the packet tear it was due to one of the boxes not being closed properly as it was a sharp edge that had torn this packet. I was really dissapointed in the service and left without a meal which was already paid for. I am a regular daily customer of Louis Botha Mcdonalds and this service is not at all fair on me, i am not being paid to be a cleaner that picks up food from the ground i am very fimilar with the mcdonalds policy and it states that if food has fallen within the store the food should be replaced hence the manager shouldnt even need to be called where as in this case i was left feeling guilty to accept a meal also no where does it state that even if food has fallen does a customer need to pick it up themself. i am willing to get my attorney to tell me the way forward if these workers are not reprimanded correctly.I Have emailed customer care and no one has gotten back to me this is really terrible service and im certain if mconalds franchise was to find out about this they would too be very dissapointed.