Overfull MyCiti buses in Sea Point

I would like to lodge a complaint regarding the bus service on the 109, 108 and 105 routes after 12h00 daily. These buses are often overfull and often drive past the stops leaving commuters waiting for more than an hour for a bus with space onboard. I have complained about this situation in the past and was advised that there are extra buses on these routes with a bus every 12 minutes. This is certainly not the case. Are there no bigger buses available on this routes between 12h00 - 17h00 Mondays to Fridays Please? Please investigate this matter.