Fanx RK3026 tablet needs custom Rom - Android Q&A, Help & Troubleshooting

Hi all,
i've posted this in the general forum and they sent me here:
we've bought two 7" tablets from Fanx with the RK3026 chip (not that i know what that's supposed to mean but there you have it)
the model is M2
android 4.4.5
Kernel-version
3.0.36+
[email protected] #2
tue Jun 17 17:55:48 CST 2014 Version 1.0
Build-number
APAD_Android_4.4.5_Aonuoxun_20140901
This is what i found in "about the tablet" or something similar in the settings menu. So i'd need another android version with no pre-installed apps except for the very basics and/or maybe educative apps. Also, we're dutch...for whatever that's important, now you know...
The reason that i want to change this android version is because this tablet keeps pushing to install paying apps. I've put them into flight mode right now to block the wifi and for now it's not really a problem but i want my kids to be able to use this tablet fully because they need to learn how to work with one. (i did this to prevent them from ending up like my wife who hardly knows how to turn on a PC and thinks that microsoft is a browser, i can safely say this as she'll never reach this forum )

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Okay...you've made me do this
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