Translation of intervene in Spanish

We felt a little dumb and waited for the hot water. The boiler seemed not to work and we started to become upset. We asked the technician to come once again and he admitted his mistake.
We can try it out tonight, if you want, we just have to find the right hour. Peru is 5 hours behind Switzerland. So I'll just pay a visit to Peru in order to travel around and see the architecture.
The same afternoon (October 4) we took a flight to Arequipa, spearing a bus ride of 12 hours. Due to heavy winds we had a delay of 2 hours. We took off at around 4.30pm.