lost lunguage and told it's not their fault

Due to staff negligence my language was lost when I arrived at the Durban station. When we arrived at the station Citi liner security guard was putting the bags down and people started to take their language and the security was no checking the bags according to the stickers. My language was ****** and I was told by Citi liner that I should have insured it. Why was I not told when I bought the tickets, I still haven't received an apology from all they are doing is giving me the run around, and they have the nerve to call themselves the peoples company..