What is the correct process to report suspected insolvency or corporate misconduct in the UK — are the GOV.UK and Action Fraud links sufficient?

Context: Maekersuite Ltd is registered in London. If a UK company takes consumer money, stops providing the promised service, and abandons customers without resolving its obligations or formally dealing with insolvency, this may need to be reported.

Possible reporting routes:

GOV.UK Company Complaint Portal:
https://www.gov.uk/complain-company

Action Fraud — Insolvency Fraud:
https://www.reportfraud.police.uk/insolvency-fraud/

Related discussion:
https://www.reddit.com/r/unofficial_appsumo/comments/1tw69d6/maekersuite_bites_the_dust/