Unfairly Treated

I'm Matodzi Tshilambavhunwa I was appointed as the trainee TBM at Lewis store Boksburg CBD I started on the 07/03/2022(Monday) on Thursday I was advised to report at Lewis store Johannesburg Pritchard street as from Friday on the 11/03/2022 till 19/03/2022 I haven't paid yet for the days I've worked it's 2 weeks which is 12 days...I've communicated with the HR and Regional Manager but I'm not getting any assistance I've tried my level best to communicate with them even now my massages and calls are being ingored kindly help with this issue I worked I believe I should be paid as per my contract... my question is if I was still with the company was they were gonna except me to be on duty without paid???