Thanks Pakecc,dear PGY, Really I feel the mental pain of yours. When we even feel restless for a online order's expected delivery date was over but not delivered,irrespective of its value, I could imagine the mental torture when we paid from our hard earned and took delivery but could not use the product for so many days with so many follow ups and getting ignored continuously.
My one more suggestion is to shoot mails to all of their TOP management regarding this . Address can be taken thru web.
With reagard to installation, it is always better to do it yourself after going thru the manual.And I'm sure, you would have enjoyed the installation process when you DIY. For fixing the rear speaker, u can use a local carpenter, if you need it to fix in a wall.
Whatever you have said is right, the worst thing is when you buy something which attracts more of your interest and when it doesnt work as expected, we will go crazy

Regarding the installation, it took a couple of hours, i did on my own and as everyone said, whatever the installation they do after that we have to do some modifications, so i thought i will install it and if i have any questions i will check it out here

What else we need all the FM's are really helpful and having an same point of interest, they can help us more than the technicians.