Google + Account Mix Ups

So I have tried to contact support which has been entirely unhelpful for this situation.

I had three or four emails and wanted to take it down to only one. So deleted two and the university deactivated my university email once I graduated (6 months after I graduated). I started getting messages on clan of " google + sign in failed. This google account is already associated with another game account"

So it had to be one of these accounts, before anything happened I contacted support as I said which they asked me what device I used, which is only my phone and where I am located. The last question was 'when did you start playing' which i gave a rough estimation. After that they resent the same exact email some lady named Sherry from support though I sincerely think its a robot based on the messages. I said I already responded. Basically said tough ♥♥♥♥ because I didn't know the exact date of when I started? Which seems ludicrous. But anyways it seems I'm on my own since Supercell has been exactly zero help.

After this I reactivated two of my other google accounts which it may have been, tried to sign in with both of them...neither of them worked. So I'm guessing its my university email? Anyone else gone through this or know what to do?

I also have never been able to purchase gems even when I didnt have problems with the signing in bit.