Complaint on service provided at OR Tambo Int.

I would like to lay a complaint for the service I received whilst dealing with one of the ladies that was stationed at your sales counter at OR Tambo Int. on Monday evening. <br> <br> Through who's actions I subsequently missed my flight , whilst a group of 3 people who arrived at the ticket sales counter a few minutes after me were promptly helped and quickly rushed through to board the exact same flight which I was earlier told there was no way I could get on given I had missed the opportunity to check in my luggage. <br> <br> This was even after asking the sales lady if there was any way they could get me on the flight if I just had hand luggage(as at the time of asking I had a friend at the airport who was seeing of a family member leaving on a different flight),to which she rep**** no and that there was nothing they could do for me other than book me a flight the next as they wouldn't be able print me a boarding pass given that I had already checked in online prior to the flight and that they were only the sales counter and as I could the checkin counter was already closed. Only to find a few minutes later they reopened the check in counter to print boarding passes for the group of 3