You can't cancel. I have canceled twice and they continue to charge my card under different phony company names - "kit access" and "verimi llc"... likewise we sent back the product and they did not give us our money back. they are thieves!
They continue to charge us even after we have canceled twice. they charge under different company names so you may not notice. luckily my company, chase, noticed and called me about it. stay away! these people are thieves!