I just got another call from Apple. This was the same person as last time and I'm still being told I cannot use Google Sign-In with my app because Pokemon GO us

I just got another call from Apple. This was the same person as last time and I'm still being told I cannot use Google Sign-In with my app because Pokemon GO uses it and they somehow think it related. They repeatedly said this is final and there are no further appeals an I will have to replace Google Sign-In with something of my own. I asked why Pokemon Go could use Google Sign-In and they said "because it's related". I asked them to explain that and all they would do is repeat "because it's related"...