Build a timeline before asking for money. Include the breakdown time, branch contact, roadside assistance, replacement vehicle, unused rental days, taxis, hotels, fuel, and any written promises from staff.
Start with the breakdown timeline
People often ask for compensation in one frustrated paragraph. A better first complaint is structured like a claim file: what happened, what evidence proves it, what the rental company did, and what outcome you want.
Evidence to collect
- Photos or videos showing warning lights, mileage, location, and vehicle condition.
- Roadside assistance records, tow reports, call logs, and incident numbers.
- Messages or emails with the branch, broker, roadside provider, or customer service.
- Replacement vehicle paperwork or written confirmation that no replacement was available.
- Receipts for reasonable extra costs caused by the breakdown.
- The rental agreement, final invoice, and any refund already applied.
What to ask for
- A refund for unusable rental time.
- Correction of any invoice that charged for days after the vehicle became unusable.
- Reimbursement of documented, reasonable costs caused by the breakdown.
- A written explanation if the company says the breakdown was caused by customer misuse.
- Evidence for any damage, towing, admin, or recovery charge added after the breakdown.
Keep the request realistic
Ask for a clear, evidence-based outcome. If you ask for every inconvenience, the company may dismiss the complaint as too broad. If you ask for documented unused rental time and specific receipts, the case is easier to review.
If the company says a clutch, engine, gearbox, brake, steering, or other mechanical failure was caused by misuse and bills you for the repair, use the mechanical failure charge guide to request the diagnosis, service history, event evidence, and itemized repair invoice. If the main problem is a later call-out, towing, or tyre invoice rather than compensation for lost rental time, use the rental car roadside assistance charge guide to request the dispatch record, provider invoice, tow details, and calculation. If the company is billing extra days or a separate downtime amount after the tow, use the rental car loss-of-use charge guide to compare the off-hire, repair, and back-in-service dates. If a one-way or drop fee appeared because roadside chose another recovery branch, use the one-way fee dispute guide to compare the tow destination with the agreed return location. If the replacement created a second agreement, overlapping rental days, or unclear credits, use the vehicle exchange billing guide to reconcile both cars and both payment records.
When to escalate
If the rental company or broker does not respond, follow the complaint route in writing. If the booking was through a broker, separate broker responsibility from branch responsibility. For a captured card charge, ask your card provider about dispute evidence. If reimbursement has already been approved but has not reached your account, use the missing refund guide to compare the promise, revised invoice, processing record, and statement credit.