Expert on Joomla software to assist with website alterations.

Really urgent (to be finished by 15/08/13 preferably!).

I need assistance with making a number of alterations to my website (www.stuff4uni.com). The software is Joomla so would need to be experienced with this.

There are a small number of jobs I need including:
1) Adding an additional content block to be positioned below the cart functionality.
2) Adding a menu tab on homepage (where packs are listed); so the ability to change the homepage navigation.
3) Attempting to address an issue I have with the shopping cart --> Sagepay system.
4) A couple more very small jobs (changing wording on pages).

A phone call would best suit to help explain a little more but I hope that gives you a rough idea.

Thanks
James