Appaling service!!

We travelled with this airline weekly, with multiple trips and traveler's a week. After the appalling service we received yesterday we will never make use again of their services. Lack of staff at check-in made at least 7 travellers miss the flight, we missed check in of luggage with 3 mins. We were personally insulted, sent to customer service, lost money, had to pay in and again almost had a repeat on the second flight. All while not moving and remaining at the check-in counter. We were told to watch the announcements over-head at check-in and they always do a last call. Upon our much later departure our original flights information was still being displayed overhead and no last call on either flights. We have videos and time stamped photos as proof. Only for the flight to board late and travellers being assisted even though they missed the baggage check in! Probably due to the long que and only 2 staff members present! Why do we have to loose money, pay-in due to their shortage of staff? Why did other travellers also had to loose money and pay-in, but on the second flight they accommodated other travellers?