To purchase a message pack click on the store section on your home tab as shown below.
You will then be directed to the store section of Palringo where message packs can be bought, you can either select a message pack that is on show on the screen in the message pack section or click show all.
Once you have selected the message pack you wish to purchase verify it by clicking select.
You then will be asked to select which user you wish to purchase the message pack for and how long you wish to purchase the message pack for as shown below.
Once the user and amount of days have been selected you will be asked to confirm your purchase by clicking confirm purchase then will asked for your itunes details as shown below.