It may be worth sending them a lawyer's letter threatening to sue for costs and damages (or whatever the lawyer says) unless they fix the issue. It's faster and

It may be worth sending them a lawyer's letter threatening to sue for costs and damages (or whatever the lawyer says) unless they fix the issue. It's faster and easier and cheaper for them to placate you than to even send a lawyer's letter back. You don't have to follow through, necessarily - just poke them in the face rather than the ass.