Vaal 1 stop Wimpy bad service

Vaal 1 stop Wimpy. From JHB to KZN on the 21st Sep, food took 30 minutes to arrive and order was incorrect. Vaal 1 stop KZN to JHB, order a toasted sandwich and the description shows full portion of chips, received half a portion, waiter raised the matter and it took another 15 min to get the other half of my chips. BAD service overall, bad way to start and end a holiday