Translation of heptagonal in German

There are very cheap language courses at the stores in Germany, but they aren't all good. At our school we have private clases. 60 min costs 20 Eur and 45 min 15 Eur. If you are interested, I can book it for you.
Our bus was completely full and we were the only Europeans on our tour. There were also Americans and people from South Korea. The driver took us to a place called Tam Coc. He drove like an idiot.
The town on the other side of the border is called Arica. You immediately see the difference to Peru. Fast food chains, brand names and modern stores appear all over the city.