Can i ask for spoilers?

Please spoil the story here for me 

 Adonna:

it's trash but everyone seems to love it - so this politician guy marries the sister of the person he wanted to marry because she left him and he didn't want the scandal to get out. The fill in sister who marries him is 'mute' but only for episode 1 which is terrible writing ploy. Any way, she's kidnapped, he doesn't care/tell kidnapper to kill her/she gets away and steals his untraceable cell phone. Not surprising at all but the wife uses the kidnappers phone to try to escape the marriage by threatening him to divorce her. But then there's this weird dichotomy between her hating him/wanting out of the marriage/still wants him. Then there's awkward times of slow mo 'oo things are kinda romantic sorta close' which is obviously teasing them eventually getting together - boring. There's a lot of ableism too. 

Are you sure you are watching When The Phone Rings, What you told you about the plot is nothing they are showing in the show. 

First of all, the marriage with sister was to form alliance, He was not marrying her because he is in love with her.  And Heeju was never mute 'MUTE', She had selective mutism. Then She got kidnapped, Its not that He doesn't care. He asked her mother and her mother in law, Her mother in law said she was with her. And you will say, then why he didn't call HHJ if  He really cared, So HHJ can't speak due to her mutism. And Heeju mother said she was with her. So he thought it's a voice phishing scam. 

Now lets talk about your points about dichotomy, Here she took kidnapper phone to get out of this marriage of convenience, In first episode she was desperate to get out of this marriage, but through all the phone calls she is making through kidnappers phones, She is learning many new things, Where she is finding out that Saeon is not like how he presented himself infront of her. 

Here the plot is about how these two individual who lived as show window, starts to open up and show their true feelings. 

I don't think you will continue watching the show as you don't like it, but if you are continuing. Try to watch the show when you are not high. So you can think some sense while watching the show...

Romance lol