Milagrow M2Pro 3G Call 8GB Dual Core tablet upgrade

I have a Milagrow M2Pro 3G Call 8GB Dual Core tablet running 4.2.2 jelly bin. I want to upgrade to atleast kitkat. there is no online upgrade available . any help ?
specifications
Operating System Android Jelly Bean (4.2.2)
Processor MTK 6572 Cortex A7 Dual Core
Internal Storage 8GB
RAM 1 GB DDR3 Double Channel
SIM Card Slot 2 ( One Micro and One Mini Slot)
USB Micro USBx1(to PC/charger) Doesn't support OTG

Thanks in anticipation