I can`t really help you, since the system is really weird

Go directly to "Календарь 2015 "Трансформеры Прайм"" купить | Transformers Prime. Calendar 2015 | Лабиринт

1. Press "В КОРЗИНУ" = > "ОФОРМИТЬ" = > "НАЧАТЬ ОФОРМЛЕНИЕ"

2. You are supposed to check "выбрать другой город / страну" if your current city is not already activated.

What do you see on the second step?

(3. Use DHL delivery and Pay Pal payment.)