Mtn refuses to cancel my listing

I am writing to enquire about my current credit record on ClearScore, which reflects a score of 618. Despite this, I have been unable to apply for any credit, and I would like clarification on the factors affecting my score. Additionally, I have noticed an MTN router account listed under my credit profile. I wish to dispute this listing, as I returned the router to MTN within seven (7) days of purchase, in accordance with their return policy. The account should therefore not appear as an active or defaulted item on my record. Kindly investigate this matter and provide feedback or confirmation once the listing has been reviewed and corrected. Please advise if you require any proof of return or supporting documents from my side.