Vivint Home Security  Contract Rip Off, Internet

My Mother, in her late 80's, signed up for Vivint 4 years ago. She did know it was a 4 year contract. When I tried 2 years ago to cancel the service I found out she was locked in for the 4 years. She either had to buy out the entire contract or sell it to some one else and let it be their problem. 

I waited until the contract was due to be over and tried to then cancel it. You can nopt cancel by phone. Their policy is that you must write them a cancellation letter. I wrote the letter in March, 2012.

In May, 2012 I answered a phone call from Vivint wanting an update on credit card info. I refused them and after talking to five different people I was connected with theit account resolution dept. After explaining the situation Harry told me they did not have my cancellation letter on file and since it was not cancelled, they had automatically signed us up for another year. I could, within 30 days of the end of that contract again write to them and they would cancel at that time. I refused this option also. I informed him that I wanted it stopped now and nothing else would be acceptable. Once again I was told I could pay it off or sell it. These being my only options for resolution.

After much discussion and being put on hold several times it was decided that I could send them a copy of my origional letter and if there were any problems, Harry would be calling me the next day. I never heard from Harry again.

Now, in June 2012, I recieved another please update your credit card info call. I'm being told now that I am indeed locked in for this year and that they recieved my copy of the letter 7 days later than their time limit for cancellation. I sent it the night I spoke to Harry! I refused to update and was informed that after 3 months it will be sent in for collections. 

I did everything they asked and am still locked into this scam they've figured out? I have tried everything. Now they are telling me that IF I could just prove I actually faxed the letter back in March, they could cancel, but this is the only way. Since it was faxed from a home machine, how in the world am I supposed to do that?  

I honored the origional contract. I did everything that was asked of me. Why should I have to pay on this thing that I do not want for another 12 months and still have no guarantee it will end then? How do I get away from these people and their system?