Insignia LCDTV26 26 in. Television "videotron canada" Questions

...Canada) using Videotron cable system. Cannot get more than channels 2 - 13. Should be lots more. Any ideas? You can get manual from; http://safemanuals.com Enter the HISENSE as the product ...

...Videotron in Canada). Whenever I change the channel, or use the majority of the buttons on the remote, a large black square appears in the middle screen. It disappears when I press "exit" on the TV ...