Cartrack - Faulty NEW Device message

CarTrack fitted a device on my trailer on 15 October 2019. Yesterday morning 31 October 2019. I received the below message:

“Cartrack: unit with registration CF......NEW has been tested and found faulty, Please contact Cartrack Fleet department on *** to book repair”

I phoned the number above since many times yesterday as well as today. No response till now no assistance received. Why would you provide number that is not working?

Why didn’t cartrack call me as they have my contacts and this is security matter and should be addressed urgently?

Why are you fitting faulty devices? Don’t you test these things before coming out to your clients?

Is this what will happen when incident requiring recovery happen? No one will answer your phones?

Do you have any working contact number?