I imagine this is part of the reason they have pay options, to make you think about whether you actually want to spend real money on them.

Im not sure how they can really harrass you. They have a ring on a 30 minute cooldown that lets them teleport to you, that's not that much worse than someone just /searching you and teleporting to the zone you are in.

There's supposed to be an npc to annul the wedding anyway, not as simple as throw away the ring. Not sure who or where it is, but go talk to the npc's around the chapel and see if there's a way to properly divorce yourself.