Understand the specific record
If you believe you are listed, ask the reporting acquirer whether a record exists and what reason was reported. Do not infer a listing merely from an account closure.
Address inaccurate information
Start with the acquirer that supplied the record. Mastercard's privacy notice describes its treatment of MATCH information and available contact routes. Get qualified advice where the record is disputed.
Future applications
Answer requested history questions accurately. Another provider makes its own eligibility decision; a listing is neither an automatic approval nor a universal statement of your options.