Fraudulent alarm company installed hardware on my phoneline how can I be sure it’s all removed?

I fell for a scam from a supposed GE Alarm system dealer, who promised a free system in exchange for “advertising” their product. Long story short, they installed the monitoring panel on my land line phone line and now won’t come get it out now that I’ve canceled. I’m sure they intend to come [...]

When a home alarm system is removed should the monitoring company have discovered on their own via monitoring?

I moved a few years ago. I was renting an apartment and removed the alarm system. Now, three years later the monitoring company claims I did not notify them of the removal and wants to be paid for monitoring per the auto renewal contract provision even though they provided no service. My [...]