How can I change the DNS servers used on my Helix Fi?

Tell  me Cedriks, Since I can not change the DNS adresse could you tell me what can I do to correct this LAGGING  and ERROR page that i'm getting....
Here are the result of a Rtace Route that I did from my computer to the DNS on top of Mount Royal 
We can CLEARLY se that i'm getting LAG 

Thanks in advance for any help that might guide me to a solution... 
I called Videotron support but they don't seem to understand what I'm talking about and make me restart my helix terminal every time.