I have the same tablet as you have. I bough a lot of this device direct from the manufacturer and because some of them came with problems, i got the original firmware from them.
you can install it with uberizer (i: A1X firmware menu > 5. start LiveSuit > and from there you got it, don't forget to extract the img first)
i will attach the firmware here for you and others that have this prob.
Sorry, the file is to large. You can download it from here http://filesharing.md/download.php?id=792d7ee2f4f174d4e5385812103a55ed
but the link is only valid for 10 days.
Maybe someone here can help me upload the file or if you want just get in contact with me PM or email:
we do not email anything .. this is a public forum .. ill see if i can grabit ..