Discovery insure policy

Yesterday I checked my credit report. My current policy with discovery insure as well as my cancelled policy shows active on my credit report. Keep in my mind the cancelled policy that still shows on the report was cancelled in April 2017. I phoned discovery insure to query this. I spoke to Cushal and was promised a letter that I can forward to Transunion to update my profile. According to Transunion, discovery insure needs to email the letter directly to them as they where the one to submit my details and status in the first place. I phoned discovery again and again explaining this to them but I get told that its discovery insure policy to not deal with credit bureau directly. I phoned transunion once again, according to them this cancelled policy has been updated for the past 8months by discovery insure itc department. I am furious by now, phoned discovery insure again, spoke to the manager, with no luck. This is unacceptable service. I don't understand how discovery insure cannot update a cancelled policy on itc but keeps on updating it monthly . I ONLY HAVE ONE SHORT TERM INSURANCE POLICY WITH DOSCOVERY INSURE. Terrible service!!!!!