Jet

I had opened an account an jet in 2017 and closed in 2020, in that period i only missed 3 payments due to lockdown. I settled the account and went to the store and requested my account to be closed and they assured me it was closed.fast forward 2023 im trying yo apply for finance and im told that account is affecting my score as its still active by itc checks, i contacted jet they told me they dont my account anymore i should call RCL and they told me the same that they dont have access to my records anymore. They tell me i should contact nimble i do so and they tell me they dont have any accounts under my name, so im stuck now not knowing who to call as they have not been helpful at all and this is affecting my life moving forward and im not happy with the service at jet as they have not been helpful at all.