Touchmate 8' Touch screen HDMi Internet Tablets reviews and complaints

I would like to submit my complaint again as there was a mistake in my telephone number. [protected])-I purchased a touchmate 8" Touch screen HDMI Internet Tablet from MAF Hypermarkets LLC {Carrefour} Deira City Center Branch at17.25 on 30th of March 2013.It was Dhs 599.Very first day my son showed me a crack there at the edge.Then I said "you have done something" So I didn't care. Then again he showed me something written on the back side of the box.It was "without charger". I checked. But there was a charger.So I said him not to care. But ever day he is complaining that it is not charging properly. children are very keen not like us. Yesterday he has checked the charger & showed me that it is not the charger of that tablet.Serial no. is different.According to the box Power adapter should be(DC 9v, 2A) But the given one is 5v, 2A Then I got to know that we purchased X-tab. But the charger is from a U-Tab.Now On/Off button is also not working.I felt very sorry about my child.Because he complained me several times, though I didn't care.I trusted Carrefour.I came to Dubai in 2009. Since then I have purchased a lot of things from them.( Deira City Centre) They can check with my phone no:[protected].They must do an inquiry about this matter.If they don't take an action about this, I have to take an action.Because in Dubai we don't hope things like this.In this tab, Modal no is TM.MID 880.But the charger of it, M.No.is TM MID785. When I told the salesman that I want to check, he said, not allowed. According to the bill, he is:9003462 .My e- mail address is( [protected]@ yahoo.com ) I hope an answer soon. I would like to attach photos of them.