Talk to Gynecologist on Hard Breast Unable To Feed

Just 4 days ago , mena baby boy hwa via operation, ab issue ye aa rha little champ unable to feed , chest boht hard ho rahe hy and dr said garam pani sy sekai kro with towel or hot water bottle of water on chest then feed , but no any progress , then said use sucking pump , but uss k use per b koi such milk not coming out , and bust like a hard stone - plz guide me i am too worried thanks