App rejected for In app purchase error

Question

My app got rejected from app store with following reason:

We found that your in-app purchase product(s) exhibited one or more bugs, when reviewed on iPhone running iOS 10.2.

Specifically, a purchase error message was displayed when we tapped the subscription in-app purchases on the Pro Membership screen.

All my products are getting fetched correctly from in app services.

On further debugging I found that I am receiving following error

Error Domain=SKErrorDomain Code=0 "Cannot connect to iTunes Store" UserInfo={NSLocalizedDescription=Cannot connect to iTunes Store}

Error is resolved when I follow this url

But my question is how can I take this case with the Apple review team?