You do have to treat opals with love.
Not wearing them can cause them to dry out which can cause dullness and, ultimately crumbling.
You shouldn't wear them in the bath or shower and definitely not if you are doing the washing up.
They are beautiful but not really as durable as some other gems.
If you can't get a refund or repair, it may be worth having the opal replaced at your own expense rather than simply not wearing the ring.
"There are two ways to be fooled. One is to believe what isn't true; the other is to refuse to believe what is true.”
Søren Kierkegaard, Danish philosopher (1813 - 1855)