From HUD's RESPA page:
Effective July 21, 2011, the Real Estate Settlement Procedures Act (RESPA) will be administered and enforced by the Consumer Financial Protection Bureau (CFPB).
If you are a consumer with a question or complaint related to your mortgage or mortgage servicer, please contact the CFPB’s Consumer Response team at 855-411-2372 (855-729-2372 TTY/TDD) or click here.
If you are a settlement service provider with questions about RESPA, please email the CFPB at CFPB_RESPAInquiries@cfpb.gov.