KOKO= keep on keeping on.
He is acting as if he doesn't give a shit because he doesn't give a shit. He's angry, oh yes, but that's because you have defied him, failed to be the grateful little woman he belihingeves he deserves. He is waiting for you to realise your mistake and grovel.
If you were to grovel now, he will have the upper hand again and will treat you worse than before because you will be telling him "I am nothing and no one and am forever grateful that you have bothered to forgive me and allow me to glance at your wondrous face O Mighty Possessor of a Penis, for that is who he is.
Eventually, with no contact from you, he may try the being sorry route himself. It is no more true than anything else. He will make promises which he has no intention of keeping. He just wants you back in your box doing what he wants, being subservient and scared of upsetting him. Ignore him.
Desperation côuld lead him into trying the being ill gambit. He'll say he's scared, that he's dying, quite probably of some as-yet-unidentified "but definitely serious" thing. Or "gulp, it's my heart", or somesuch. This will be bollocks. At most, tell him you're hanging up so you can call an ambulance for him' and then do hang up.