Answers
A brand not paying after content is delivered is one of the most common disputes creators face, and how effectively you can act depends heavily on what you have in writing before you started work.
A factual, evidence-backed review describing exactly what happened — dates, amount owed, and what you delivered — is one of the most effective tools available to a creator, both to warn others and to create pressure on the brand to resolve it. Stick to verifiable facts rather than characterizations, since accuracy is what makes a review defensible and useful.
For higher-value disputes, or a brand with a pattern of non-payment across multiple creators, it’s worth consulting a lawyer or a consumer-grievance body about formal options — the right path depends on the amount involved, your contract, and your jurisdiction, so this is a case where general guidance stops being useful and specific advice matters.