Terrible service from Mango

I have always used Mango Airlines but with the shocking service that I am receiving I don’t think I am going to use them anymore as a carrier. It is now over a month ago that I queried a double payment. 40 minutes on the phone from one section to another to eventually be told I had to send an email to refunds. No response from refunds. Wrote again – they responded to say they would get back to me in 48 hours!!!! That was nearly 3 weeks ago. No response from further emails. SO FRUSTRATING. I tried to book a flight for the 2nd October but while waiting for the credit card verification (for ages) it then gave an unsuccessful message. The next day I tried again but changed the flight to the 3rd October – this was successful and I received a booking confirmation.(did not receive a confirmation for the 2nd) 5 days later when I checked my credit card 2 flights had been taken off my account. I am a pensioner, I cannot afford this double payment. The treatment I have received is very disrespectful.