To my knowledge, their is no functioning adapter on the market that provides a direct VGA to HDMI conversion. All those adapters are false advertising.
To connect your Laptop to your TV you will need to have either an HDMI port or a DVI port on your laptop. If you have an DVI port, you can buy an DVI to HDMI converter, but note that you will have to connect your laptops audio source to a speaker or a direct aux line to the television.
If don't have a DVI port than your last resort will be to get a USB Adapter that will convert VGA (including Audio) to HDMI for you. You can find one here: http://newcomputerinquiry.com/store/all-541966-B00K4W62R4-VicTsing_VGA_To_HDMI_Output_1080P_HD_Audio_TV_AV_HDTV_Video_Cable_Converter_Adapter.html
Hope that helps.