1. if you area aggrieved by the conduct of your employer then you can file case either in high court or in CAT depending upon the situation.
2. There is no requirement to take any previous permission of anyone to file such case.
3. There is no apparent adverse consequences for filing such case.Else every one would have stopped voicing protest agaisnt the injustice.
4. I do handle service matter and if you wish to take my help you may contact me. You would get my contact details in my website - www.acelegalfirm.com.