Mango tripple debited us!!!

We decided to book flights with Mango on 11 December 2019 and made payment online but my husband was tripple debited!

Since last night we have been trying to get hold of Mango but we cannot even get through to anyone. How am I supposed to dispute the transaction if I cannot even get through to a call centre agent? I have been on hold for the entire morning! This is pathetic! We cannot afford this. There is a serious problem with the website payment function and now we are out of pocket. This experience has made me consider never using Mango again.