Review unfair dismissal at CTM Secunda

hello, I was employed at CTM Secunda on the 21:05:2018 and given a contract on the 28:05:2018 ,this contract termination was on 28:08:2018.i started working at the back as a picker which after improving my hard work I was then moved at the front as a sales rep to prove my sales skills. I took the chance that I was given as a sales rep,am a fast learner ,good with communication skills , how to approach customers and more especially to sell.i was working as a trainee with the name tag on me(trainee),I didn't have my own rep code as I using an ex collogue's scanner(sheree V/8083)..when I asked that when will I be starting to use my own rep code an scanner I was told that "you will work for 2months without pay as this will prove to us that you are a hard worker and that you are willing to do what it takes to join our team"(Gilford Malik). I agreed to this terms as I desperately needed this job. Was given a contact that I filled in with my personal details and handed it back to (Gilford Malik),who said he will send it to the head office, when I asked him that when are we signing 'flexi -timer' ? ...mr Gilford answered by saying..."will come back to that one, just do your job".
I now started feeling like part of the 'team' as I was knocking in normal time and doing extra duties before knocking off....as I worked harder as a trainee and starting to enjoy my work on floor I came to realize that Mr. Gilford lacks profession and that some of his work he doesn't know (e.g.) as I went numeral times to him with customers wanting to buy items, because my scanner would report (NO STOCK)SO I WOULD GO TO HIM SO THAT HE CAN DOUBBLE CHECK ON HIS LAPTOP FOR US, BUT ALL HE WILL SAY IS "SORY SIR/MAM ITS FINISHESD" AND WHEN I GO CHECK AT THE WHEREHOUSE I WILL FIND THE ITEMS THERE AND THE CUSTORMERS WILL BE VERY HAPPY AND PUCHASE THE ITEMS NEEED. ON THE 10/06/2018 I arrived a few minutes late and Mr. Gilford confronted me on the floor Near a cash desk saying " I don't have a job for you anymore here at CTM SECUNDA ,so you can go and never come back & don't worry about your contract cause I've cancelled it already !!" Mr. Gilford said those words to me right in front of other stuff members ,I lost my job without receiving 1t verbal warning , written warning or take me to his office and question me why am I late .
:was working without pay so transport was an issue sometimes:
THANK YOU.