Take up your iPad issue, since your iPad is only about a month old, with Apple, directly, at 1-800- MYAPPLE.
Ask for customer or sales service or someone involved with warranty service.
By AppleCare, AppleCare is supposed to allow one accidental damage replacement of your iPad.
Calmly and even toned, explain what happened to your iPad and what your local Apple Store did to the Apple employee on the phone.
If necessary, if you do not get any satisfaction from the first employee on the phone, calmly and politely, ask to speak to some other cognizant, higher ranking Apple employee and, once again, calmly explain your situation with your iPad.
Keep doing this until both you and Apple have reach some sort of equitable agreement or solution. that is favorable to you.
You shouldn't have to accept an accidentally broken device that is only a month old.
Also, in the future,if your case gets resolved, look into a different case/cover combo for your iPad Pro, just in case.
Good Luck!