Not cool at all --- Heroes Charge - Google Play - Ucool

I've been playing quite a bit of this mobile game, Heroes Charge by Ucool.
You gain heroes via various game functions to form a strong roster of heroes which you then send on various missions. The game is rather well designed that different missions tend to call for different types of heroes hence making the mission to gain more heroes even more important.

In all honesty, I've had a lot of fun with the game. A lot of fun.

There is one issue that is causing me a lot of concern and on the off chance that you are facing the same problem as I am, I'm going to write about it.

Apps on Google Play are generally very well behaved. You download the app and you use it.
In the event that there is an update, you generally have to update your app via Google Play. That is the way it should be!

In this age of shrinking data caps on mobile data plans, mine is only 2GB, it is important that users be given a choice to update only when they know they are safely on Wifi. This actually got me wondering. Maybe it is only in Singapore that we have been constrained by 2GB or thereabouts of mobile data plans. Maybe that is why this isn't a concern for users in other parts of the world. Hmmnn...

Heroes Charge for whatever reason, does not follow this protocol.
You still need to update the app via Google Play but I have received nasty shocks after updating my apps before leaving home and the comforts of Wifi.

What kind of shocks?

This kind ...

A 200 MB in app update that triggered when I ran the game.
This was after the game had already been downloaded off Google Play.
These updates vary in sizes and happen regardless of whether you are on Wifi or mobile data.

I've sent 2 or 3 emails to Google Play but I must not be reaching the right persons or they are simply  not concerned about this.
I've written Ucool but received no response.
Ending up in a situation whereby I just have;

1) make sure the app is updated in Google Play
2) open it to make sure there are no further in-app updates
3) when I open the app while I'm outside of home, hope that there's no updates rolling out
4) and if there is, quickly kill the app before the updates download.

It is kind of ludicrous though that updates are now one-tenth of my mobile data cap size and even more ludicrous that I cannot disable such updates from happening till I'm safely in a Wifi zone.