our legit plastic bag disappears in the king pie s

We went to king pie to buy chips and waited for them while busy waiting the chips came out we took them an left we forgot the legit plastic at king pie then we came back late to look for it an they said they never saw it...wethen asked to see the ffootage they said their camera's are not working an we went to the mall control room they showed us that the plastic was left at king pie an wen we asked king pie personell she answered us with an attitude telling us she didint see it