Bad service from SA AIRLINK FLIGHTS

I was treated very badly by the OR Tambo flyairlink staff on the 2018/07/06 . I was rushing to Umtata flight (8755@15:45)and I was travelling with my son who was just operated(KNEE OPERATION). I requested for a wheelchair or assistance as I have not booked for an assistance, Reason for not booking the wheelchair; my work already booked a returned ticket for me and my son. The day we left Umtata airport my son was still able walk ,He was going to see the Orthopaedic Dr in JBH, The Dr decided to operate that is all the problem started, Because I already had return ticket and now coming back home with Cast on his leg and Flyairlink staff could not assist me to the boarding gate. I was given a wheelchair and the porter who was supposed to wheel my son never pitched up. I wheeled my son to the boarding gate almost lost my laptop at the checking gate ,while struggling to push the wheelchair. A lady who came running after me and told me she is coming to fetch the wheelchair, She asked my son to get off the wheelchair by the boarding gate. I struggled with my son with no help to the bus at the boarding gate, with no help at all. I am very upset, I was not expecting anything like that from Flyairlink. To the flight there was an old woman who assisted before we could go in, the flight attendant lady with the one who was in the Bus never bothered about my son. I struggled to the flight alone putting my son on my back (10 year old heavy, with cast up to his hip)up the stairs of the flight, with no remorse from the flight attendant lady.