Worst Customer Experience...EVER!

What a terrible customer service experience with Hisense.

First of all, our television broke in early January (luckily still under warranty), but let me tell you - that helps NOTHING! Hisense collected our device and here we are, more than a month later still trying to get feedback as to where the television is and if, at all, it is fixed. I have emailed, phoned (nobody answers), and complained on Twitter already and get the same response: "Someone will call you back and provide feedback". WELL, guess what.... STILL, NO FEEDBACK AND NO TELEVISION RECEIVED. This is the worst customer service I have ever experienced in my whole life. What must I do next?? Drive to the head office and wait until I receive it? For all I know there is no television anymore. I AM SUPER FRUSTRATED, TO SAY THE LEAST!