Kulula.com double charging and difficult getting a refund

Kulula double charges clients and getting your refund is very difficult. I have been double charged for a ticket I paid for in November 2019 amounting to around R4 400. I sent all the evidence; bank statements, confirmations from the bank of the double charges for the same tickets and still no refund or response from them. If you do decide to use Kulula.com, may be better not to share your bank details with them for them to take money themselves as my experience has been very poor and there is another client who shared the same experience. Which makes you wonder how many of their clients have they double charged? and if it is those people who do not check they bank transactions in detail, they may not even realize that they have been double charged. Personally, I won't use them again, I do not support shady companies. This is very shady.