Translation of desagradecido

The billing of additional working hours is not justified, since it was our request to download the software and wait for the new version. They have admitted the error of the translation.
Yes, but on the other hand, using full, simple sentences also helps people who are learning the language more than just the short clauses. It is probably a mix of both, but I have not decided yet which ratio is the best for us.
But we learned only the general rules such as personal pronouns and articles, accents, some verbs and general vocabulary. I also love the sea and the sun, and the beautiful mountains too.