Skywise Refund???

Travelstart requested my banking details for a Skywise refund (which I promptly supp****) on 22/03/2016, promising that the process will take 7-10 bank days. On 06/04/2016 (9 bank days later) I get another email requesting my banking details once more. This I promptly supply again. After 7 further emails requesting confirmation that my banking details has finally been received, 6 phone calls and over 90 minutes of waiting on hold for a 'specialist consultant'. Apparently this elusive person is the only one in the entire refunds department that will be able to tell me if my banking details has been received and when my refund will be processed! To date not even a single phone call or email from them other than their automated email replies promising that their aim is to respond to all queries with 24hrs!