If you can't find your donation information, it's because the information provided by CCB to the Red Foundation's bank is incomplete, and the Red Foundation has received your donation. However, it is possible for the bank to change the full name of the remitter in your 600 yuan into B2C or city bills. The donor's information cannot be reflected in the foundation's accounts. If you want to verify, you must contact the foundation, and the foundation will issue a receipt to the donor. This receipt can be deducted from personal income tax.
Another possibility is that your donation account is not from the foundation, and it may be from other organizations. You can check whether the account you donated at that time belongs to the foundation.
It's not just the foundation that has your situation. I have been a volunteer of China Red Cross Society. There are many similar situations. If you have time, you might as well take time to volunteer, even for a day.