Are you referring to the CA middle class tax refund? Did you change bank accounts too? Did you have direct deposit for your CA tax refund?
https://www.ftb.ca.gov/about-ftb/newsroom/middle-class-tax-refund/index.html
From the CA tax site:
Need some help?
If you have further questions regarding this one time payment, contact our customer service representatives.
Phone800-542-9332
Weekdays, 8 AM to 5 PM
**Disclaimer: Every effort has been made to offer the most correct information possible. The poster disclaims any legal responsibility for the accuracy of the information that is contained in this post.**