How to change my username of CiteHR?

I don't know ...it is not user friendly .....I have been on this since 7 years...nut nothing I cud understand ....for example I want to change my location as it is wrongly mentioned but m not getting the option.
User name I am trying to change form last 6 years, but in vain.....

Dear Citehr admin
Kindly change my name as "MOHANDAS M" . As of now my email id comes as profile name.
Regards
Mohandas M
9847165434

Dear Admin,
I want to correct my user name (first name only) from Rahum M Gham to Rahul M Gham
Please help me out to correct the typo error in my first name.
Thanks & regards,
Rahul

Hi Admin team,

Please change my profile name as Sudhapradheep, as of now my designation is reflecting in my profile as Sr.Executive-Hr

Hi I want to change my user name from Raviraj Engineering to Kavisha ...please help me out to change it