Please disable my secure home ADT app

HELP! Please disable my ADT Home security app as I am worried about my phone being hacked and my home alarm being deactivated. The last time I went away I did not get the usual sms from ADT. There were problems at home.

I spoke to Shaun Moodley from your Pinetown office who assured me that this could be done. He told me that he would send an email to get the technical division and they would phone me. That never happened. I sent an email to ADT always there site who responded but again nothing happened to assure me that my home alarm app had been disabled. Please help. I am worried and frightened