Most complaints fail because they're vague, emotional, or aimed at someone with no power to fix them. Effective complaints are specific, calm, and escalated correctly. Here's the method.
State exactly what went wrong, when, and — crucially — what resolution you want (refund, replacement, credit). "Fix your terrible service" gets ignored; "I want a refund of $X for the order that arrived broken on [date]" gets action.
Anger feels justified but gives the company a reason to dismiss you. Firm, polite, and factual beats furious. You're building a case, not venting.
Give frontline support one clear chance. If they can't help, calmly ask to escalate to a supervisor or the complaints/retentions team — the people with authority to say yes.
Get names, dates, ticket numbers, and confirmations in writing. Email or chat beats phone because it's documented. A record is your leverage if you need to escalate to a chargeback or a regulator.
If the company stonewalls, your leverage is public reviews, your card issuer, and consumer regulators. Companies often resolve quickly once they realize you know your options (consumer rights basics).