I forgot my Samsung pay pin so I can't able to changed or reset it.what should I do

It just came after oreo update

finally A5 2017 get update

Samsung you just cheat us .this is not fair you totally forget the mid phone users. I brought A5 20F in 28k because i thing its a good phone in some terms and because i thing samsung is trustable brand hahahahahaha my fault even not thinking about ...

My A5 2k17 haven't got any security update after november