Turkish airlines - ******ion

I was ******ed money from Turkish airlines. I was booked on a flight TK1087 on the 31 March 2022 from Istanbul to Monte*****. The flight was cancelled by Turkish airlines. We were reissued with tickets for the next day. On the 01 April myself and my 2 friends arrived at the boarding gate even before it could open. We were one of the first passengers in the queue. All 3 of us were denied boarding on the reason that our visas were invalid. Our visas were issued by the Serbian embassy here in SA seeing that Monte***** does not have an embassy here in SA, this is the norm. The boarding gate staff were rude to us and were not properly training because the visa did indicate “visa valid for Monte***** only”. Many SA passport holders use this visa when flying with Turkish airline, even I friend the day before used the same visa. We were sent to the customer service desk to state our case. The staff there were also rude not only to us but many other passengers. We were asked to rebook our tickets which was the only option. Tickets were rebooked and paid for with my credit card for all 3 passengers. We had to sleep at the airport lounge for that night on our own cost. We arrived at the boarding gate the next morning 02 April 2022 with the same visa and were allowed boarding. Hence the visa was never an issue. Turkish airlines claim that the reason for not refunding me is due to me not showing up at the boarding gate for flight TK1087 on the 31 March 2022 and then because my visa was invalid. They claim that they did a thorough investigation into the matter. Had they done a thorough investigation they would have know the reason I and every passenger were a no show on flight TK1087 on the 31 March 2022 was because the flight was cancelled, if the visa was an issue then why were we allowed boarding with the same visa on the 02 April 2022 hence the visa was never an issue this was just a tactic to ****** money from us. Both my friends after many back and forth communications have received their refunds. Why refund 2 passengers and not the other when all 3 travelled together and had the same issues. Also, I was the one who paid for all 3 rebooked tickets on my credit card, why is it then I am not refunded? Turkish airlines are doing this to many passengers, and they seem to be getting away with crime. I will continue to take to social media and newspaper until my money is refunded. Please do not fly Turkish airlines. Throughout our communications Turkish airlines have contradicted themselves with false actuations.