Re: Had a call...
Had something similar, only this time my job role (essentially deskside support, network, BI, DBA, anything with a plug) was got rid of and my position got downgraded.
New IT Manager comes in along with a contractor to take over the BI & SQL I used to do who then proceeds to ask me to help him understand the database structure, etc.
I refuse.
The IT Manager overhears this, goes balistic and drags me to HR. Fortuneatly they point out that it's up to me whether I want to help the overpaid contractor (being paid way more that I was before the downgrade) since the company isn't paying for that part of my knowledge anymore.
The best thing was it cost the company a ton in external support fees (~£5k IIRC) when I handed my notice in the following day since I'd had access to all of the systems and they wanted to make sure I hadn't left any backdoors.