wireless keyboard mouse combo not working properly

Hello dell team. we are using a dell wireless keyboard and mouse combo and my kayboard some keys are not working properly my keyboard is under warranty i will shared you serial number can you please check and help me.

S.N:-CN047TV0LO30019IK5LDA01

<The serial number does not show warranty. The serial number shows the age as 3 years, 196 days old and the Dell part number 47TV0 KM117 Wireless Keyboard And Mouse combo. Once contacted, the DELL-Cares agent will need your private Dell order number to verify the purchase date and warranty. DELL-Admin>