I didn’t take the easiest solution.

As I was living in Cumbaya I tried to get the bus from there. But at the bus stop I learnt from the ambulantes sellers that it was not passing there anymore. So I took

a bus to Tumbaco (San Marin shop) and there got a bus to Lago and then another bus to Coca.

At coca, I was lucky my bus was stopping at the new and the old stations. The old one is close to the center. Then no need for a taxi.

It cost me 14$ (aug 2018)