Theft under KFC premises

I went to KFC in the morning and left my phone on the counter ,I realised that in the same compund &went back told them can i have my phone that I left on the counter the supervisor said she looked at the footage and saw me putting in my back I should go back to Pick n Pay and demand footage as Pick n Pay they ***** things ,I did just that and the manager showed me the footage and i had not taken anything out of my bag he told me to go back to Kfc and demand to see the footage of me putting my phone in the bag.I went back The supervisor Jabulile told me she cannot allow me to see the footage I was very angry to what is that they hiding Im a paying customer why am i being treated this way .I went to the police station to tell them my story and we went back to the store thats when the supervisor changed her story saying she did not see the other footage when the lady took my phone ,i was requested to buy a usb stick for the footage of which they cut short . I was **** to again the next day by the manager telling me there are no cameras outside the shop of which he was lying .I was a paying customer whos phone was lost in the shop where they literally let that woman take my phone & after they lie about.That customer was very friendly with them on the footage as ot stated they know her , I need Kfc to do something as I was **** too and my property being ****** because of their lies