Complete Lack of Integrity and poor customer experience

My really poor experience took place on Sunday passed , Fathers day , I had checked in online for a flight that was scheduled to leave at 07:55 King Shaka International to arrive at Lanseria , due to unforeseen circumstances myself and my family arrived at 07:30 am still thinking I was on time as all comms indicate that if you check in online you need to be 10 minutes before time ( this was confirmed 10 minutes before at boarding gate on Sunday verbally) , I was immediately told that it was too late without even being heard out , when I tried to explain staff got agitated and instructed me to buy a new ticket , whilst I am aware of the rules and do not dispute that , my complaint centres around the lack of empathy firstly , on fathers day I was stranded with my family and the initial only option was to buy more tickets after being told that it was too late , when I approached your ticket sales the time was now 07:45 under the impression I was too late , to my surprise I was then offered the opportunity to send 2 people onto the plane , 15 minutes after being told it was too late , please Kulula tell me how is this possible?...I was too late and then 15 minutes later being told I could send 2 people onto the plane , is this because 2 of my seats were already sold?....I find this unfair practice and has left me completely flabbergasted as to how this is even possible?...this is the item I need clarity on , and someone to tell me how this would be possible , eventually Kulula because of the inconsistencies and extremely poor customer experience I spent close to R4000 at one of your competitors because I refuse to deal with businesses that lack integrity and the know how of customer experience. Thank you once again Kulula for destroying fathers day for my entire family and in the process showing me that once you have my money , customer experience is a distant memory. Considering the service I received on Sunday , I actually do not think I will get any response or compensation from Kulula , the less I expect the better with your company , it is after all what my latest experience suggests.