Uber needs to responsibility and refund my money

On Saturday 15th February our power was off so we decided to go get a few groceries and KFC. We went to Bergbron. We order the Uber back. When we to our destination I asked driver to park behind my daughter who was in Blue car. He wanted to go forward but there were people pulling out from the driveway that is why I told him to stand behind my daughter. I got out of the car and my other daughter got out going to the boot when the driver just off. We though he was moving forward as he kept on insisting on going forward. He then drove away with my groceries and KFC worth all most worth R500. We tried calling him immediately with not success as you can’t call his number. We reported this on the App and were told to wait until the driver responded which was the next day. We got a call from the Sunday around 8 the next night. We then brought our groceries which was in his boot the whole day.. HOW DOES UBER NOT TAKE RESPONSIBILITY. IMAGINE OUR FOOD THAT WAS MEANT FOR THE SATURDAY NIGHT WHOLE DAY IN THE BOOT AND MY GRANDKIDS HAD NO FOOD AS OUR POWER WAS OFF AND THEN TO TOP IF OFF THEY STILL CHARGE ME R90. YOUR DRIVE RODE AWAY Driver Mabvuto Lameck. And now I am told I cant claim my money back.