USELESS TRACKERS!

I settled my account in May 2019 and cancelled the contract too due to unemployment, I keep getting calls and texts messages telling me i still owe them and that my contract is still active. I sent them multiple emails with the proof and i kept following up with them AND TO DATE I'M STILL WAITING FOR THEIR RESPONSE. Instead of doing their job they keep sending me messages of a bill that clearly shows they are *********** and not doing what they get paid to do. Disgusting service through and through. Thank God my car never got ****** while my contract was still active coz they are USELESS. They are a tracker company but they cant even keep track of their customer accounts and payments!