Justanswer.com JustAnswer Signed me up for a monthly membership without my express consent Internet

My microwave display board was glitching.  I was led to Justanswer.com through some online searching of my problem.  I was hooked up with an online "technician" for $5 (nothing was said about also signing up for a monthly membership at $40/month that never expires) named "James."  On James' advice I purchased a part online for about $70 or so.  This part did not fix my problem.  Justanswer.com charged me $40/month X 2 months before I caught what was going on, plus the initial $5.  So, with the $70 part which was incorrect plus the $85 I've been charged by Justanswer.com, I am now out $155 and my microwave still has not been fixed correctly.  

I did manage to get into my account to cancel my membership and I received a confirmtation of that but no refund.

https://www.youtube.com/watch?v=Z0Ge-oEgDEk