We had used Monitronics for several years as our home security service. In September 2016 we decided to replace them with ADT. ADT installed their system in September 2016 and removed Monitronics system We had authorized first Monitronics and then ADT to bill monthly charges through Mastercard. Late in 2016 I noticed that Mastercard was still charging us for Monitronics. The four monthly charges in late 2016 through 1-28-17 totalled $188.02 after we had cancelled their service. In a long unsatisfactory discussion among me, Mastercard, and Monitronics (Credit Dept.?), Monitronics told me they were not going to refund these charges for services they did not provide. Monitronics informed me that they had received a "fraudulent" letter from ADT saying ADT had replaced Monitronics. How they were able to determine the letter (in spite of being correct) was fraudulent is incomprehensible to me. We want our money back.
Rick
Houston, Texas