Mango Refund Section - No Customer Care whatsoever from them

I have booked tickets with Mango Airlines. Due to a mistake from Mango Consultant, she let me make a double booking for a passenger. I had to pay for this booking.

I have sent my first mail to Mango refunds on 21 October 2019. After receiving no reply from them, I sent them a another mail 18 November 2019.

Today is 20 November and I am still waiting form someone from the Refund section to contact me.

I have been phoning the contact centre. Everytime I have to hold on for about 15 - 20 minutes before someone answers the phone. I was put through to the Refund section twice - just to find no answer. I am really so frustrated.