Hello everyone!
Finally! I found the van service that is legal, which means Cops won't impound the vehicle for transporting people between cities leaving passengers on the side of the road to their luck!
Ok, its called ALIANZA. The bus companies got together to offer this service that so many request. They are all in 1 office.
For more info (prices, schedule, etc) check their FB page
VAN SERVICE Guayaquil-Cuenca and viceversa.
You're welcome.