I cancelled my XXXX ( mifi ) service in XX/XX/XXXX. XXXX continued the service and continued billing me for three months after contacting them XXXX times. They show that I owe {$110.00}. I have sent letters, community care posts, made phone calls, sent proof that I did not use the service, and told same to collection agency. They stopped calling and sending collection notices for a while, but started again ( XX/XX/XXXX ). XXXX is still showing money owed and the debt / collection is now on my credit report.