Call him back is the correct way of saying it. The second one is not correct.

Hello, According to the explanation below, "call him back" is the correct answer. Call (somebody) back: to telephone someone again, for example because they were not at home when you telephoned last time: ● I’ll call back later. ● Can you ask John to call me back when he gets in?

call him back" or "get back to him

Since my husband left me I used to cry everyday thinking he has gone forever even when I called him some times and he never even cared to pick up the call. I caught him cheating with my friend. I called my best friend. My husband is a very handsome man and all women will like to have him if they have the chance too. After we have kids together after 9years of marriage my husband use to love me like no other ever since my friend came from Texas to pay us a visit and stayed with us  because things was not going well with her at that time and let her stay and search for a good job over here in Florida that's how my husband started acting somehow and always telling me dey going out to help her search a job. I love my husband so much even after I caught them have sex on a good afternoon on my way back from the grocery store  to get some stuffs I was shock to get  them together in the visitors room then we fought me and my friend and she left the house. Since then me and my husband have been having problems even after my friend left the house to rent somewhere else. My husband was still going there and he didn't  even care about me and his kids any more.. To cut the story short, they were even planning to get married as a couple and move out of Florida. So it has been 2years my husband no longer cared for us. When I even called him to ask him if what he was doing was right he always replied to me I should go for a divorce or he would bring the file himself. I can't afford to lose my loving home and my husband for someone else then I search for the help of a great spell caster Called Dr OWO and he helped me so much with advising me on what to do and I followed to my great surprise my husband called me for the first 2 years since he left home that I should forgive him that he has come back to his senses and he is really sorry for letting me and family down. In 24hour of Dr OWO casting a spell for me to help my love reverse back to normal like the way it used to be. He came