Very poor customer service

We recently purchased a Samsung series 7 Smart TV. We chose Samsung as it is synonymous with state of the art, easy to use electronics. The TV is all of that, however it uses an unusually large amount of data. 170GB in 20 days. We stream movies/shows from Netflix/Showmax/Google play movies for max 4 hours per night. With our previous My Gica device we used approximately 1GB per hour - we never had issues with excessive data consumption. All our other devices that are connected to our wifi have data monitoring apps installed and our wifi router is secure - so we have double checked to make sure there is not another device consuming the data. I have also switched the apps' auto update function off. Yet it still consumed data at an alarming rate. I have called the Samsung call centre twice to request assistance, on neither of the 2 occasions were the call centre personnel knowledgeable about the TV or helpful at all. Just denying that it can't be the TV. In fact I am still waiting for the product specialist to call me back after I requested to speak to somebody that knows what they are talking about. There is also no data monitoring function on the TV or an app that can be installed to monitor the data usage as the TV does not run on Android. Overall I am extremely disappointed in Samsung's post sales customer service and I would not recommend their Smart TV's at all due to the excessive data usage and poor customer service.