Smart a**es always try to answer wrong,

Well this is the fact.

After rp stamp in passport, not much can be done.

NOC no NOC he is working illegally with the other company.
Secondment is not allowed before 1 year and only valid for 6 months (not renewable)

The only option he has, is to get NOC from old sponsor, cancel his RP and come back on a new visa with the new company using the NOC