Not giving refund

<p>Last week I called into the call centre and changed my flight to an earlier flight. Mango debited my card for the change. The agent did not tell me the "earlier" flight was actually delayed so when I complained Cinzia changed it back to the original flight and told me my card will be refunded within 7 days. I called in today , a week later, spoke to refunds who said no refund has been loaded and according to Nondi, Cinzia did not load the refund. I am now very irate as Cinzia has not done what she told me she would do and I cannot get hold of anyone to help me. I have phoned 5 times and been on hold collectively for over and hour. Please can someone contact me urgently. Booking ref is PLGYQB. Tel number ********** 664</p>