Credit card charged twice expected to wait

I did a online flight booking which was double charged twice on my card, after informing the Kululu customer care on the 20th of April they indicated it will take 4 days to reverse, post that i nothing has been action-ed and the contact center supervisor keeps avoiding written communication as not to obligate themselves to timeline. After various emails to them finally today Shana Liebenberg indicates it will take 6-8 weeks for my funds to be reversed.