2 Free screens/2 Free Repairs a lie

My Galaxy S5 had water damage. Took it to the Samsung offices for repairs since the selling point for the phone was that you get 2 free screen repairs or 2 free water damage repairs.<br> I was told that I was covered by the warranty, and that the phone would be ready for collection after 5 - 7 days.<br> Today however, I called Samsung, only to be told that I need to pay before the repairs can be made. How, when I was sold the phone on the basis of the free repairs?