Please do NOT ever sign up with ADT

We signed up with ADT on 31 January with a 1 March start date. We also asked them to install security cameras which we paid a deposit for and we were told initially that it will be installed the week after we signed. Alarm was only activated on the 12th of March after we constantly followed up with them. The installers were here most of the day and the alarm is still not properly activated. Our app is not working and we were told to phone the manager which we did but he is not getting back to us. We are still waiting for our cameras to be installed with no idea when this will happen. We logged a complaint with ADT after the activation was delayed and when they phoned us back they could not help us because as per their records our password is incorrect. We asked for our contract to be sent to us to confirm the password but they are also ignoring us as we are still waiting. Our callout is also not working. We cancelled our contract with the previous provider because we were not happy with the service but I honestly regret signing up with ADT as this is by far the worst service we have ever received from any company. The worse part is that the bad service is across the whole company! If this is our experience during the first two weeks how will 12 months be? We want to cancel asap!!!!