hi there…
give your dad a couple of days to calm down, and let him phone you. you don’t need to keep calling him. he knows you called, as iam certain your mother would’ve told him as you left a message.
he needs time to calm down, so please, consider it. i know you love him, and he knows you love him, but he needs to be the one to call you, and not the other way around.
i usually call my dad every 2 weeks, as we live far apart, and dad is not a phone person. he prefers to speak in person. so, if i call dad before the 2 weeks, he is pretty grumpy about it at times.
i sometimes wait for a month, then he’ll wonder why i didn’t call him, so he phones me. letting time go by is a good thing, and it can put things into perspective. regarding your hubby, i don’t think your dad hates him. perhaps your dad was offended that after he offered to mow the lawn for you, that he was refused, and despite the fact that he knows about his heart condition, when he was refused, it likely hurt his feelings, and this probably happened before too, and that is why he has these feelings towards your man.
what the both of you can do is not tip toe around him to much, and treat him like he is fragile. your dad was the provider for his family all your life until you left home, and when you refused him, despite having his best intentions at heart, it hurt him.
i can understand that. men like to feel needed and appreciated,especially when they grow older. just remember, he was young and vital once too like you and your hubby, so he only wants to feel loved and important, like he is needed. can you not find another task that you need help with that is not going to strain his heart, and ask him to help you with it?
that would help smooth over alot of his hurt feelings. dad’s are really great people, and sometimes we need to see life through their eyes

think of it this way, how would you feel if you were not able to help your kids out if you had his condition? wouldn’t it make you feel somewhat inadequate? sure it would! if your kids knew your heart condition, and they tried to coddle you, you’d likely feel irritated.
the best thing to do is to let him calm down, and next time he phones, if you have a chore to do, and it wont tax his heart, invite him over to help you out. make him some supper or lunch, and talk. its always a good thing to do. keep in mind, he is your dad, and he probably feels guilty for cussing, but don’t let that be an issue between you 2. forget it, forgive him, and go on from there.