Northern Hill magazine disappears

I paid for a full page advert to be published in the first Gauteng issue for 2019. I received a notice that they are closing down and will refund my money. I am still awaiting the refund after about 10 emails. I don't get any response. I can't find any telephone number that works. I will appreciate if anybody has contact with Northern Hill magazine or Centerpiece publishing to respond to this review.