Disabled system apps, device stuck at loop?

I had disabled some system apps that were sucking a lot of battery and they didn't seem to be that important, to me :silly: , now it gets stuck at boot animation, no looping.(can't edit title)
The device is running 4.4.2 Kitkat and is a mtk device.
I thought about replacing the file that contains info about disabled apps, but I don't know which file is that.
Recovery is stock, garbage, throws installation aborted error on flashing.

Any way I can flash custom recovery image? (fastboot is not working, tried with adb too)
Can you suggest any other way to solve the problem without resetting user data or flashing stock rom?

Thanks,