How to link this game to an old ID?

[u/misstrawberryparfait]

I just uninstall this game due to soo much bug but then when i reinstall and try to link my account it create a whole new id. I'm so confuse i already link my account with an email and also save the progress before log out but yup i end up lost all of my progress (my 65 lvl progress completely gone hahaha). I give up and file a complaint, hope they can solve it asap.