Unfair dismiss

Hi. My name is Mzukisi Xweso. I have been working for St****curity company for about 1year four months. On the 27th of March I was not feeling well and I visited the Dr and he booked me off for 4 days starting from that day (27 to 30th of March). When I came back to work one the 31st of March 2021, I brought with my medical certificate as needed. They returned me home and told me to bring back their uniform. On the 13th of April 2021 they fired me without paying the month I have worked(March) even though I have missed only 4 days. I am struggling right now I could not pay transport for my children to go to school and we couldn’t get enough food at home because I don’t have money. Please assist. Star Security No. ***