Fingerprint recognition failed

My iPad 6th gen suddenly wont recognise my fingerprint. Have tried 4 new fingerprints, have wiped sensor, fingers are clean, dry and grease free. Updates are done. Have switched off and on again. New fingerprint works for a few hours then doesn’t. Have run out of ideas. Apple support has been truly awful. Spent the morning waiting for a booked call. Disconnected 3 times before anyone spoke to me. Booked another call for this evening which never materialised. Is this standard poor service? Have wasted last evening and most of today trying to get thro.