Never go renew the FD or go with other banks?
SInce you money is from CIMB FD, that 20K is ineligible for the promo.
Since you have topped up in Dec 2024, then your promo period is from Dec, Jan , Feb.
https://www.cimb.com.sg/content/dam/cimbsg/personal/document/tnc/accounts/2024/casa-tnc-nov2024.pdf
Ignore the Nov in the name, it is Dec 2024 one.
Your base interest of 1.19% on your 25001 credited on last day of month
Total of 3.2% only on your 5001. So you will get the remainder 2.01% of the 5001 by 31 March
"Bonus Interest/Profit (if any) will be accrued daily and credited into the Qualifying Account(s) on 31 March 2025"