Bad tendencies

Yesterday the 5 August 2022 my son ordered big king baccon burger meal and two large med salted caramel shakes the whole order amount to R180.00. When the delivery s****** comes my son went outside and payed with R200.00 he was supposed to get back change of about R20.00. The guy told him he does not have extra cash with him but he will bring him change later after he had delivered to other customers. We waited the guy never came back, even today nothing. Seemingly this delivery guys when they see its a child who pays for the others they then take advantage, because last month similar thing happed my son ordered on line a meal of full chicken,chips and 1l coke,,,full chicken with chips was delivered but coke wasn't,then the delivery guy told my son that he forgot the coke at the counter he will bring it in 20min but we waited for hours before we can get that cold drink. We had to phone to find out that why was the coke not delivered we were given excuses.