What can i do when i got wrongfully accused of stealing with a receipt

I preorder and paid for a cake at Publix on September 11 for pick up on September 20 when i went to pick up the cake i left the buggy at the register with a cashier to go get some cheese because the cakes were paid for i left the receipt in the buggy as i was approaching to the buggy two managers were standing at the buggy one stated the cake price didn’t match the price on the receipt and i wasn’t going to walk out his store with his cakes so i was like are u serious u trying to tell me I’m trying to steal your cakes so we walked over to the bakery and he steady pulling the buggy from me at this point I’m embarrassed and being humiliated over a cake he told me he was going to call the police on me and the guy there said he remembered me and i called my mom in the store she told them she paid for so the worked lifted the cake up saw the other and explained they were on the receipt as one no apology no nothing just u free to go