"..had to teach a person.. " "..remain available for consultation... "
Should this happen to you it's time for the scorched earth protocol.
1) Accept you'd job is over as at some level the firm has become infected with a***ole management.
2) Is "training" part of your job description? If not this is an increase in your responsibilities. That means a pay rise.
3)Having management sign off on your training skills means they should now go on your CV. Coping with a non native language speaker is bonus points.
4) Make sure HR sign off on this as well so they can't pass the buck.
5) Consultation implies consultation fees, not life time technical support. Ideally leave the rate to be determined later. If they insist on a specific rat and it's too steep they will never let you leave until every last fact is pumped into the PFY's (or his foreign equivalent) head. Charge by the hour, and make sure the first hour is mandatory, so if it's an easy fix (because he doesn't know what he's doing) you don't miss out.
6) Should they ask to hire you back permanently check how many hours you've billed them and get the pay rise in writing from them before you accept. I'd also suggest you ensure they get rid of your replacement and get authority to select your own replacement.
They gamble that the job is simple enough and the newbie competent enough that they don't need your level of skills (and cost).
Accept they may be right.
Otherwise make sure they pay through the nose.
Biting the hand that feeds IT
