Worst after sales service!!

Following an email sent on the 3rd of December of a siren not working. After not having any contact from ADT by the 7th, I called. It was mentioned that the mailed was logged and booked, but no one could tell me when the technician could come out & someone will contact me. After AGAIN not being contacted by ADT by the 9th, I had to call again. ADT stated that the technicians were busy and that they have me booked for Tuesday, the 13th. I asked that this must be done, because as I mentioned on all calls, I will be going on leave. Yesterday, 13 December, just before the technician is supposed to come out, I get a call stating that they now realise that it was a 3rd Party contractor that installed the alarm and ADT has not even contacted them yet to make a booking. Akhona, apparently then got into contact with them to arrange for them to come out. I was very upset as I am leaving for my holiday today, the 14th, after 12:00. She said she will follow up and contact me back - which of course did not happen. This morning I had to phone again... Akhona was very surprised that Derick (the contractor) did not phone me, yet she did not follow up with them either - she would phone me back. At around 9:48 she called back stating that Derick will only be able to come out late this afternoon or tomorrow morning. I got extremely annoyed because again no one can give me a time & after 11 days off begging ADT to do their job, I now need to pay the price for their incompetence. So let's make this very clear: ADT forced me to sign a 3 year contract. But a little over one month after installation at the first sign of a problem with their own system, it takes more than 11 days for a technician to come out to my property to fix a siren. I have nothing to do with who ADT employs as subcontractors. I do not pay them, ADT is very quick to take their money from my account.