Inconsiderate Harrassing Company

I cancelled the service, and paid the remaining monthly subscription. But the complaint is that Cartrack still phones me endlessly, endless text messages, harrassing me and have the audacity to call me 7am in the morning. I don't know what else they want from me. I would have considered the service in future but now I would not take a life time subscription for free from Cartrack if it was offered.