Kulula - website problem results in multiple booking and they charge me! Refund in 8 weeks!

I attempted to book a flight on Kulula and on entering my credit card details the Kulula website informed me, Oop. Something went wrong....sorry. An unhandled exception has occurred and the request was terminated. Please refresh the page. If the error persists, go back. I ultimately reverted back to the website and did the transaction again, and this kept on happening. On about the 6th time I phoned the call centre to be informed that EACH transaction had gone through and the money taken from my credit card. The call centre person informed me the refund would take between 6 and 8 weeks. I informed him that this was unacceptable and requested that someone deals with it. He was extremely reluctant to provide a person and ultimately provided a Kulula (011) number. I phoned then number and the person was unable to assist me, was totally disinterested in my problem and provided an email address; ********** . I provided my full details to this address and someone reverted but informed me "we do hear your concern and we really apologise for the inconvenience caused by our website. Do not hesitate to contact us for further assitance. This matter then want backwards and forwards and has not been resolved. I do not find it acceptable to what for 6 to 8 weeks for a refund on a matter that was not of my making. It is tantamount to *****, with Kulula having taken my money while I continued to follow there instructions. This is just not on and I require Kulula to have the decency of addressing a reasonable request in a reasonable manner. I have requested a refund in a 7 day period.