unfair dismissal

I have been working on probation there since the 15th of September 2022. I was never given a contract same day I only got a week later. I worked there as a parts sales lady so I worked on someone else's credentials login details. which is against the law. the manager did not train me because few days later he started calling me baby, my person even said I should tell my mom that he is the son in law. I showed him that I don't like it instead he started treating me bad. I tried logging the grievance his boss said it could take a while he will talk to him. on the 15/12/22 he went on leave and I was left to work with the other person's password for the whole week. yesterday I received a WhatsApp stating I'm dismissed. reason being I was not permanent. no probation procedures were taken or whatsoever.