Netstar shows to be very disorganised and in shabbles.

Got really bad deal with Netstar. If I write to them using their email address they do not respond. I called them to ask why my tracker was not sending any messages even when the battery is removed they said my unit was not responding to my surprise is it me or them to identify a unity that is not working. They promised to send a technician this wee on Thursday that mean as of now I paid but the unity is not working. To make matters worse this morning they are calling to tell me that they are fully booked for this week despite their case number ***-S2M8 & CAS-***-Y7V1 they gave to me last week. Please can someone help me to report what Netstar is doing to me. I pay them but they dont give the services as agreed. They are a very disorganised company I ever dealt with. Who expect me to know that the unity is not working when I dont even know where it is in the car.