Withdraw a career note
Send a deletion request with the earlier reference and use its original email where practical. Explain clearly if you want removal rather than a correction.
Clarify the writing
Point to the relevant section and describe the missing context or inaccurate statement. A general example is sufficient; private client evidence is unnecessary.
Separate paid services
A transaction with another organisation remains between you and that organisation under the applicable terms and law. Cavirelmo has no payment or refund system for those arrangements.