SUPERSONIC worst provider I have EVER dealt with!!!!

Do not EVER join Supersonic, they are ******!!! And I will say it out loud!!!! Do not understand how Netflix "eats" their data 500x faster than other data from other suppliers. Normally watch Netflix every night for almost a month on my 50G data with Vox. Changed to Supersonic, my 120G data finished after 1,5 day, watching 1 movie and 5 episodes of a series on the Sunday!!!!! How the hell???? And I have read the terms, state need to give one months' cancellation notice and they will pick up router. I cancelled immediately after having the router for 2 days. Today, almost 1 month later, their customer service phone and oh...."they did not receive the cancellation request I have THREE times in October".... Then cancellations phoned, first wanted me to push for "only giving notice now" - said bull....the date I gave notice in October is on my mail your customer service agent send to you today! Then there is a cancellation fee as I cancelled in less than 6 months, I will gladly pay it to get rid of Supersonic!! But wait, I must return the router on my own expense, they not picking up!!!!! ***** ******!!!!!!!!!!!!