Return of Reckoning

i wanna change emblem guild but i cant reset blazon for change it . my guild have more 500g in bank and same in my pocket . how can i change it ?

I had 500 in my pocket and changed it.
Showed after relog though.

it does cost 500 g?

500 gold for second change. First one 10g.

When our guild reached lvl 20 it was somehow bugged. So we reset the heraldry and it worked.