Search online to locate and call contact your nearest, “local” Apple Store location to try/attempt to make an appointment to get your Apple iPad diagnosed and options presented to you.
OR, failing that,
Contact Apple support via the contact support link located at the upper right hand corner of every Webpage of these Apple support communities.
Use the Hardware Repair, Device Performance and Connectivity support categories.
OR
by installing and using the Apple Support app found in the iOS App Store.
Tap the iOS App Store link below.
https://apps.apple.com/us/app/apple-support/id1130498044
OR
Call contact Apple via the support numbers found in the link bekow.
Contact - How to Contact Us - Apple
Tap the link below.
https://www.apple.com/contact/
If you haven’t purchased extended, two-year AppleCare+ for this iPad OR your AppleCare/+ warranties have expired, be prepared for an expensive device replacement cost.
Sorry & Best of Luck to You!