There is no support issue to fix. Gearsets are saved client-side, and this is working as intended. If you didn't upload any of your character data, you have to rebuild your gearsets from scratch. For the vast majority of purposes this should be as simple as equipping each weapon and soul stone and hitting the Recommended button, then saving a new gearset. If you have any funny sets like for lower level ultimates, you'll have to equip those manually.

When you're finished, log out and go back to character selection, then back up your character data.