Waiting for a paid up letter since 2016

I was handed over in 2016 for poor payment, I also did pay my Full outstanding Payment in 2016. Edgars never send me a paid up letter to confirm that I do not have any outstanding payments with them. I was put under debt review and need the paid up letter to remove me from debt review. I phoned the company that handled my account and they said Edgars was suppose to send me the letter, I then send an email to Edgars then went into the store and they tried to phone all contacts to help but Edgars response was I am not on the system wich indicates I do not owe the any money but they can't give me a letter as they do not have me registered on the system.

I only need a letter from Edgars that states my account was paid in full and I do not owe them ant money so that I can have my name cleared please. I am struggling over a year now to have this issue resolved and hope that someone from Edgars will respond after this review.