Ubereats

I ordered food yesterday. My bill was R122.30 i gave him R200.00 note, 2× R10.00 a R2, a 10cent and a 20cent! He didn't have change so he said he will get loose change by the shop and see my now! Were is my R100.00!!! Ubereats doesnt resond. I need my money back.!!!!! Langson is the drivers name.