Although you can refer to the Ombudsman at any time, they may check with us to make sure you have complained to us first and given us a chance to put things right.
Er y gallwch atgyfeirio at yr Ombwdsmon ar unrhyw adeg, efallai y bydd yn gwirio gyda ni i sicrhau eich bod wedi cwyno wrthym yn gyntaf ac wedi rhoi cyfle i ni unioni pethau.