porto 9' tablet firmware needed (Allwinner)

I had rooted my tablet but manage to install n uninstall so many apps until the memory have seem to fail after rebooting n deleting everything...now I'm not able to save anything on the internal memory further more the status bar that normally indicates how memory is in use is now jus a blank bar..I read online that the problem could been the use of busybox app..not sure though ...want to try putting a new firmware to see if it would make a difference..do help, its needed:confused::(

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