Translation of inundate 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.
You don't speak Russian? It's not so easy to speak this. I think, my English isn't very strong at all. But I hope to improve once I have the chance to write someone whose mother language is English...
Instead, we gave him one of our Swiss chocolates as a gift so he would leave us alone. It worked: the boy went to the couple sitting next to us and tried to sell our Swiss chocolate for 2 Pesos.