Disappointed with this purchase of iPhone 11pro

im really disappointed with this purchase of iPhone 11 Pro as I’m facing several issues from the day of purchase. I tried to contact customer care but still I didn’t seek any kind of help. I was facing battery and mic issue. My battery Heath is just 92% now and it was draining by1% daily and I couldn’t even visit the nearest store because of this lockdown. Even my friends are facing same battery issue In their iPhone 11 and iPhone 11 Pro.