Prompt how to get external bluetooth dongle for non bluetooth tablet

Dear sir/madam,
I am a new person to this forum I have purchased a new tablet datawind ubislate 9ci it is a 9 inch no blue tooth tablet details are as below

Android 4.1.1
Rock chip RK2928
KERNEL linux version 3.0.36+

I want to attach Bluetooth dongle to this tablet I have micro USB otg cable and Bluetooth USB 2.0
Please suggest and guide me on how to do this and also give me down load link to ROM, firmware etc
I found a software from Google play and it is recognising the BT USB 2.0 but it is not connecting to the tablet

Please help me
Thank you