Turkish Airlines Pre-purchased Seat Issue

I purchased a ticket for a Turkish Airlines flight, including the additional purchase of my preferred seat, 3 days before my scheduled departure. However, I received an email from Turkish Airlines stating that my seat had been changed due to operational reasons. While Turkish Airlines has the right, as per their terms and conditions, to modify seats for "operational reasons," in this instance, it was not the case. Upon checking the seating plan for the same flight again, I observed that the exact seat I had initially purchased, 5A, was now available for other clients to purchase.

Turkish Airlines seems to be using the pretext of operational reasons to exploit its customers. Although customers have the right to pay for a specific seat selection (not just a seat category), Turkish Airlines, in pursuit of additional revenue, changes the originally selected and paid-for seat. They then make that same seat available for other customers to purchase, while arbitrarily assigning you to a different seat.

When contacting their customer service channels, they consistently cite "operational reasons" or suggest using the feedback form on the website. This is not an isolated incident but has occurred on multiple occasions.