Resort to harassment

I keep receiving sms's stating that we will be listed for unpaid debt. 1) we cancelled with ADT over 2 years ago (thank goodness). 2) We were on a debit order 3) in the past 2 years, we have NEVER received a call from ADT stating that we owe money - but 2 years later, get daily SMS's from Debtsourse threatening to list us. I sent a mail to a few departments within ADT requesting that SOMEBODY phones me back so this can be resolved - of course to no avail - but the harassment still continues. the only thing now is to reply, ending with F** U! ADT is the worst ever company to be associated with in any way ...have moved to TROJEN, and since then, have never had an incident. people, change over and close your ADT membership. Enough is enough.