Far too many navigation options on the home page - which makes it confusing for visitors.
Some of the menus are even duplicated - it's like a Japanese remote control in that you can do the same thing 5 different ways!
The doctype needs to be updated.
Improper use of h1 (bad for
SEO).
Top menu uses javascript (CSS would be better - more compatible, etc.).
Services ICT Managed Services, Security and Remote Support from S4 ICT has improper used of h2 and h3 (again, bad for
SEO).
I realise that the site was built using a CMS system, but the person who added the content has done a lot wrong in terms of formatting options at the code level.
It would be worth getting a consultant in for 1-2 days to go over it with you.