Bad services, bad manner for not getting back to the customer

On the 16th of October I bought 2 nhlamule dress, size 40s.and on the 23 I received a package, but it was only 1 dress, I called the the very same day after I received the package to tell them I bought 2 dresses, and the lady I was speaking with she said she will call me back the following day, when I call she doesn't answer, I send email telling her about the situation, no response until today, I tried to talk to here on WhatsApp to ask when can I receive the other dress, no response, when I tried to call today, she blocked. It's either she give me back my money or the dress.. I trusted her, hence I buy things from here. But now I am angry bcos the isn't any communication about my dress. No happy at all.