Unhappy client

I'm very disappointed with the service I got from Bonitas I have a refund due and I was promised that it will be paid within few days this was in January. I did follow up in February I was advised that it will be paid after 15 working days and they passed I did a follow up I was advised it will be paid soon. I called 12/03/2015 and I was advised that it will be paid to my bank account of which I closed it. I'm sick and tired of requesting this refund I have call references unfortunately in Jan I did keep track of the references. 100215Q6HL2, 130215Q6MHVY, 020315Q7484p, 040315Q781JG(neo promised to call me back and he didn't), 120315Q7LZLJ. I'm tired of this every time when I call I get a different story. I called yesterday(160315Q7LZLJ) regarding follow up on the bank statement that was sent through to them(ref 140315Q7NLJW) and I was advised that it take 5 working days for money to be refunded I cant wait for 5 working day I demand my refund ASAP.