I did contract with MTN at Kempton and for Samsung S22 and I was not happy how the battery last withing the 6 months of the warranty

I did contract with MTN at Kempton and for Samsung S22 and I was not happy how the battery last withing the 6 months of the warranty. And still today im using my S22 and the battery 🔋 don't last more than a day. The service i got when i was trying the phone to check it it was everty poor.