448877 Wp-content - suddenly not showing content

I am looking for an expert in Word Press and php. I had a new website built over the summer and have had nothing but trouble with it as unfortunately the programmer was not good. I have now had two or three people work on it to fix the issues. I think and hope that everything is now working EXCEPT ONE LARGE problem. The website is built on word press and incorporates wp-content. This is because I have a property rental section and people can register as a user, be approved and then can add a property listing. The property listings show on the main page - each listing is shown in brief with one photo, a short description and few other bits and then visitors can click 'read more' and the full description opens in the frame. They can click the 'back link' and go back to main page with all listings. All of a sudden the website stopped showing the listings and just said 'iframes not supported' yet nothing was done to the code as far as I am aware and was all working fine the day before and tested and this happens on 3 different computers (MAC, PC and laptop). I need to start advertising my site and getting in paid listings so need it all working ASAP, preferably today. I also need someone I can call on at short notice to fix any issues or bugs with the website quickly as it a business and I cannot have the website not working. Please only bid if your English is very good and you understand the exact problem and can work on it immediately. So you can see the problem please visit [login to view URL] and see ski holiday accommodation - this should show listings but doesn't. For someone that knows their stuff I am sure it is fairly easy. Please do not bid above $30. I have already wasted too much on programmers that did not know what they were doing.