How to Flash stock rom on my Micromax A114

Hi…
Every time I reboot my phone, it shows errors like ‘bluetooth has stopped’
'voice command has stopped'
‘com.android.phone has stopped’ etc etc..
I can’t even unlock my lock screeen because of these errors..
I tried recovery options, cleared cache and data and factory reset option..
but still nothing happened
Do i have to flash custom rom to use my phone again?
I don't care about the data/apps or any rom..
I just need my phone working by any means..
My micromax a114 was rooted..
please provide me steps to deal with this situation keeping in mind that I can only use my phone in recovery option
can’t open playstore to download mobile uncle tool or anything
please help :(