Theft in my flat

Hello, its me Tumelo Staying at 917 Plaza Place, i hate being a regular complainer but bad things are happening to me so i have no choice but to report or complain. Our caretaker has been changed and we were not notified of that. There was fumigation on hte 25th or 26th of November and i left my key at security for them to gain access and fumigate the flat. Upon return i did not check extensively at my belongings. Last week Friday the 4th of Dec i realized that two pairs of shoes are missing. This is not the first incident of theft to happen at 917,last year when the building was repainted i left my keys and found that my wrist watch and 1 pair of shoes was ******. I reported to the caretaker and he subsequently said the security guys who were suspected were fired. Then early this year i left my key reluctantly for fumigation then when i came back , my key was nowhere to be found, the fumigation people took my key with them. Godfrey changed the lock on my door and gave me a new set of keys.No again in november i leave my key and my shoes are ******.Can somebody please help me investigate this matter and also note that until such time i receive feedback on this matter i will not le