How do I unlink Twitch account so I can reconnect it?

Maybe you think it's a simple question but it's not. I was forced to change my password on Twitch and I cannot reconnect ESO and Twitch back, every time I do it prompts the dialog "there was an error". I contacted support, I spoke with @ZOS_BillE yet I cannot connect them. This time I waited for a month hoping this would be sorted out by the Devs but here I am again, asking for help from the community, all ZoS support did was copypasting a template twice which, by the way, does not work.

Any input from someone with the same issue would be greatly appreciated.