Bad service,unreliable

I'm yet to find someone from adt to sort out my query.I paid for 1 remote in December 2014.adt decided to deliver 2 remotes at an additional charge of R1848.I was met with he invoice when i arrived back from work after the technician installed it earlier on.I will now be debited with an amount of R1848 on the 27th of March.I have already paid for a remote which I was quoted by the Sales agent who came to my house in December 2014,his name is Conrad and his number is ***.I will not pay twice for remotes.please collect the extra remote or you can collect everything and cancel my contract.I'm sick and tired,I call everyday but no one seems to know what to do,all they say is I need to speak to the person who came to my house(Condrad) who has also disappeared.I will take this up with a lawyer as I believe I have a case with all the documents proving that I paid for 1 remote and now I'm being **********.