Booking.com Didn't Refund the Deposit

Dear Sir or Madam, I'm writing to express my strong dissatisfaction with Cityapartmentstay and Swikly. Check-in date: July 18, 2024; check-out date: June 23, 2024; confirmation number: 4707.526.648. PIN:8437. I paid €600 deposit for an apartment in Paris. It’s now the 26 Agust - and still the deposit has not been returned. Meant to be returned after 14 days. I tried to contact Customer service and they did not respond to any of my questions. I hope we can resolve this matter amicably and that you will uphold the standards of your reputation. Otherwise, I'll ask my lawyer to take the necessary steps to resolve this issue. Yours sincerely, T*** M****.