NEED HELP WITH A REFUND!

I bought a SImpliSafe system in December or January.  I installed all my door and window sensors via the iPhone app, however, "life got in the way", and I never finished installing the glass breakage sensors, smoke and CO alarms and siren I also purchased.  The system has NOT ever been activated via the keypad other then accidentally and NEVER on a recurring basis.   Imagine my surprise when I discovered today that I have been paying $34.11 per month for Core monitoring even though I have never activated the system. Customer Service referred me to my account rep (very helpful) who was able to credit me for 3 months, but not the full 6 months I have been charged - WHY?  I did not  receive any monitoring service from SimpliSafe during this time so I feel I should be refunded all 6 months. The account rep referred me back to a "billing" 800 number which turned out to be the same customer service dept that referred me to him! Of course there is no email contact info on the website, so here I am reaching out for help before I take the next step.  As a 42 year veteran of customer service for a very large corp, I know that there are individuals empowered to help me, all I need to do is find them - office of the President, CEO, BBB, but I hope someone on this community can help before resorting to that.  I don't feel my request is unreasonable.  Respectfully, MJP.