Kulula/Comair Pathetic Service

Booked and paid for flights to UKfor November, 2017, with Discovery/Vitality and British Airways in March, 2017. Paid with my Visa Card. I cancelled these Flights in September and they would only Refund me 6 to 8 weeks time!!! Then refused to process my instructions because of their interpretation of the Card Numbers on my Account. According to FNB this was just a ploy to delay payment. Sent three e-mails with a "letter", which I had to get from FNB, which they claim they did not receive Have just sent them more e-mails of the letter in question but still no response. Will never book with Kulula/Comair again although I still own Shares in Comair! Is this another Monarch/SAA fiasco waiting to happen?