Cannot socket rings?

Hi, i just bought a socket item from the vendor to socket my pve ring and it says the item cannot be modified.

This is the ring:

Contact them for help if you think your item’s eligible, although waiting times are very long.

https://eu.battle.net/support/en/article/314657

My guild mate is waiting for 10 days already with this exact issue. Idk but this is too long.