Undisclosed expenses

I app**** for a personal loan from Wonga finance services, it was approved, they told be that I needed to pay in R1350 as registration and my money would be released immediately. I did so on Friday the 2nd of October from Nedbank and made it available immediately. An email saying that they have received the money and that my loan would be paid out as soon as my deposit reflected, On Monday I was worried, I send an sms to Claudia (after 5 unanswered phone calls), asking if they were honest. A email was received, saying that I now needed to deposit an extra R1000 to have my loan paid into my account (non of these expenses was ever mentioned to me - and by this time I had to use my salary to pay for the expenses I needed the loan for). I was contacted an hour later by a screaming Claudia, not giving me a chance to speak. I tried to calm her down. After telling her that I do not have a further R1000 to pay over, she said that I had to send a confirmation of cancellation and that my money would be paid into my account immediately. I did so only to receive a mail stating that I needed to pay R450 and that they were to pay only R1250 back into my account. Please help !