You can deal with food complaints yourself by reporting them to the shop that sold you the food, or to the manufacturer (customer care telephone numbers are sometimes found on the food packaging).
Gallwch ddelio â chwynion am fwyd eich hun drwy roi gwybod i'r siop a werthodd y bwyd i chi, neu i'r gwneuthurwr (weithiau, ceir rhif ffôn gofal cwsmeriaid ar y pecyn bwyd).