Double payment and non refund x345

I requested for my mom and did card payment, the driver asked my mom to pay cash as well. When mom told us that she also paid we contacted the driver so that he can refund the money. He agreed that he will refund us but it's been 4 days and he keeps saying he will send money. This happened on the 20th March and the money that he must refund us is R75. His name is Clifford, registration number KD10PF-GP, car model Toyota Etios silver in color