Guild Wars 2

There is a mystic forge recipe where you can “infuse” one of the rings for 5% agony resist. If you do that to one of them you’d be able to use both.

The recipe is briefly presented on this page . Note that these components can be found only in fractals, so if you never done any of those, it will take some time to gather them (fragments drop only at level 20 FOTM and over).

Your other solution is to contact assistance and ask them if you can trade this ring for its equivalent in opposite infusion slot (all stats combination rings come in two version, one with a defensive infusion slot and one with an offensive infusion slot). Tell them you made a mistake selecting it, I have heard lots of cases already of people getting the ring they initially wanted this way.

You can try to file a support tickets.

Others in the same boat as you have been able to get a refund/replacement ring through customer support.

Your results may vary.