Cartrack put me to default

Until today they never came back to me. They put me to default on my credit score. Okay cartrack did not produce travel trip report. I told them I need it to prove at court that they were lying by putting me in a certain position where my car was not there. I told them I want to cancel but problem I had to pay a fee then waited until the end of contract after I said pay back those months where their track was not working. Come end of contract then I called please cancel and that was over a phone call. They told me they will debit next month because of that 20days. Debit went through and then month after they debit again then reversed my money. Comes early month next they called me then I told them that I canceled that contract then they told me it's active let's do a cancelation again. Phone cut then they sent me a form. I filled it and sent it back. After that they were calls and attorneys credit report default and all. I am so angry and I did again the cancelation this year and it was canceled. Now they still calling me saying I am Owing them and added me as a default payer on my profile. I am soooo ****ed and angry