Translation of exterminate in Spanish

We wanted to take a hot shower but there was no hot water at all. We asked someone to fix it and he showed us that there was a heating switch outside the bathroom which would turn on the boiler.
Nice to meet you. I am learning English but my English is very bad, we could exchange messages in Spanish. I have got all the chat applications on my laptop. Sorry again for writing with many mistakes.
We caught the last bus leaving from Calama to San Pedro the Atacama in the Atacama desert, the driest place on earth. Even NASA is using this place as a live moon simulation area. It was night though.