Travelstart refuses to Refund me for double charge

I bought a return flight with Turkish Airlines via Travel Start. <br> The ticket was charged and banked by both Turkish Airlines and Travelstart. Upon return from my trip I sent my bank statement to Travelstart to request a refund and they refuse to handle the issue. They Repeatedly say the amount was only banked once despite confirmation from my bank. What worsens it is the absolute rude behaviour from a Nawaahl. There is zero willingness to understand their mistake and to call Turkish Airlines to resolve their mistake and refund me. <br> <br> This Nawaahl individual keeps repeating the same thing and is doing nothing to investigate Travelstart's mistake.<br> <br> It is an absolute shame that Travelstart is attentive up until you undertake you journey, once you return they cannot be bothered to sort out own mistakes as a result of not understanding their relationship with their merchants. <br> <br> All you deal with is rude employees with no willingness to help.<br>