Samsung GT-C3303 MODEL business cards

Hello, MY Customer reference number: 2113883411
hello,my msg box is 300,and its showing lock symbol in my in box what does it mean?
does it have any themes to download from the net.if yes tell me the wed address.
and how can i attach a business card in the msg,when im attaching a contact and going to send its say's SERVICE DENIED what does it mean?how can i send the business card help me plzzzzzzzzzzzz