Unhappy [Q] Unlock Recovery mode in Ubislate 7c

Hello friends, I want a help in my ubislate 7c ....its recovery mode is not unlocked...when I open it I get various options in that menu like restart the device, factory data reset and many more. But when I try to selwct an option by power button or move to another option by volume buttons it doesn't work. Please help me I am also not able to install any ROM.