Uneven glass after replacement

This Ipad A1432 is almost ready to return to the owner.

The only issue is that i have one spot in the glass where it doesn't want to go flush with the case..

It wont go down any lower, and the last time i pushed it down too hard it broke the glass.

Any suggestions on how to fix this or get this lower?

More importantly, i would LOVE to be able to NOT have to crack the case completely again, so i dont risk ruining it.

As you can see, the part that is sticking out is where the joint plugs in, -bottom right corner

Would you please look at this attached image?

Since i am a noob with ipads, (not so much phones)i almost want to give this back with the raised edge(as is), to avoid any more risks, i did this for free and he keeps it in a case...