[Q] Polaroid Ptab735 help topic

This tablet is a 7 inch tablet made by rockchip , is dual core, and runs android 4.4.2 kitkat. Since I bought it I wanted to find a way to root this tablet so that I could make it faster and so that I could change a few aspects from it. I could not find a way to root it AT ALL since I bought it. Last week, I found out that KINGO ROOT will effectively root this tablet. However, I do not have a backup of the device and got stuck in a boot loop. :(

The problem is that I changed the Bootanimation.zip in /system/media and apparently the permissions were wrong when I put it. I rebooted and it got stuck in a bootloop, later going straight into recovery mode.

So I have a question. Can anyone make a custom rom for it or a backup of the stock Rom? That or show me how to use ADB to fix this since I know what caused the problem but I am running the stock rom and not a custom one and there is NO CWM or TWRP installed.

All I need is a way to delete or edit the permissions from the bootanimation.zip from ADB or another way to fix this since that is the only problem.

Thanks :)