Mango Bad Customer serv

I am due a credit from Mango. On 17/09/2015 i contacted them and was told that the credit will be processed and will take up to 14 working days for pay out. So supposedly on the 07th of October I should have had my money. On 13th of October i called again and only on my 4th attemp (as i was cut off 3 times) I managed to get a hold of them. I was informed that there was a delay and I will now have to wait till end of next week. I said to the consultant this is not acceptable and he must escalate the matter and get back to me. He did phone me back with exactly the same story. Out of frustration I posted on Mango facebook page that I am unhappy. On thursday they only rep**** and requested my cell nr and email adress. I rep**** with my email as i do not post my cell nr on public pages, and no response from them. I rep**** again on the post and still not a word from Mango! I did not make them wait a minute for my payment and now i have been waiting almost a month!!!!!!