Poor Service with no responsibility taken!

I was due to board a flight Sunday 3rd April in the morning with my elderly mother. I booked online and followed steps to ensure she had required assistance. We arrived at OR Tambo airport and I had run through the terminal to find the FlySafair office for a wheelchair. After a few minutes which involved some resistance and reluctance who would assist, we made our way to the other entrance. My brother and sister were waiting with my mom. An argument ensued with the Flysafair guy and security guard, which delayed time. Eventually I asked another ACSA employee to assist and push my mom to the counter as Flysafair wouldn't help (With a luggage trolly I couldn't push both) and when we got there at the flight gate was closed by 7 minutes. No other flights had seats available and we weren't prepared to wait till 9am with my elderly mom. The inconvenience of my brother and sister having to return back from Benoni to fetch us. Having then to also arrange accommodation added to the inconvenience and aggravation. After attempting to engage with this airline and following a few poor excuses, they just stopped communicating. Very unprofessional and disorganised. I would have at least expected to be credited for this event which was beyond our control. Shame on you Flysafair!