Norwegian Didn't pay returned Tickets

Dear right person, Norwegian
I have traveled a lot with you in Scandinavian And some of my friends joined me for travel ,On 21th Sep. I Bought 3 return tickets for myself and 2 others (Copenhagen to Stockholm), I was out for an unfortunate experience, as a bad condition of pandemic we cancel the trip and I call to Norwegian Customer service , she told me cancel the tickets and it we will send you the all money back because is less than 24 hour. I tried it and after few days Norwegian sent money back just for 1 tickets . I call them and They told me to fill out the form and send it. We will definitely refund your money. I did the same and sent it to the customer service. I waited for two weeks. as I mentioned They already only sent the money for one of the tickets and did not send the other two tickets. I called them again and they said it was a mistake to fill out the form again and send it and we will refund your money, do not worry. I sent an e-mail to costumer service again. I waited for a few weeks, they did not send the money, and I called again, and the same repetitive words that you forgot to send again. I did the same thing. I waited again. Have not sent. Now that a few months have passed, I am tired and I think Norwegian Company is a fraudulent company and it is cheating because keeping money without a reason is a ,,,,????!! and I advise you to be careful of the scams and fraud of Norwegian Company.
- I will ask for my money back. Thanks. Sincerely. Hossein Hosseini