As fisicx says it is definately not banned but I do think you are being penalised. Have only done a quick check but it appears you have multiple pages duplicated within the google index .ie
yourdomainname:/index.php?option=com_content&task=view&id=4&Itemid=2
yourdomainname:/index.php?option=com_content&task=view&id=4&Itemid=6
2 benefits pages indexed and duplicated.
yourdomainname:/index.php?option=com_content&task=view&id=6&Itemid=6
yourdomainname:/index.php?option=com_content&task=view&id=6&Itemid=2
2 What are the benefits of power flush
There are alot more but these are examples.
Also difficult to really give too much advise without seeing the files but considering your current lack of rankings (70 for 'power flushing london')I would assess these issues but also address the URL's because they are not search engine friendly. ie mod rewrites and then permanent re-directs.
I think you find this will definately accelerate any work you are doing and will help maintain position.
Plus you have alot of pages on the site, consider optimising more pages for more relevant keywords. You only need 1 page for Power Flush London. It is a local niche market with little competetion.
Input power flush london into google and look for all the listings such as gumtree, freeindex, that are in front of you and submit your site. Don't pay for anything, as its not needed.
Chris
