Both of your statements are not true. Freezone LLCs do not require Emaratis. Even if the company is owned by an Emarati one absolutely can bring legal action against the company.

You mean, that if I could have used this service, it would have been a scam and that such scams are common in the UAE, so in the future people should avoid repair companies in the UAE regardless of the specific vendor?

That seems a bit of a stretch, but I have never dealt with the UAE, is this a real thing that people know about?

Scam has started to become overused like the word slop. Scam has a specific meaning. Sounds like you are complaining about a potential problem while a scam is a guaranteed problem