Prada Sunglasses Lens Stained, Poor Service and No Response from Store

I took my Prada sunglasses, which developed a stain on the lens, to the Prada store at İzmir İstinye Park for inspection. They said they needed to examine the issue, but it’s been over two months, and I’ve heard nothing. When I visited the store, they couldn’t provide any answers. The next day, when I called, they claimed it was a customer-related issue. I offered to pay for the repair, and they promised to get back to me, but 1.5 months have passed with no contact. They don’t answer the phone either. I’m left wondering if my sunglasses are lost. The lack of communication and customer service is disappointing, and I expect Prada to resolve this issue quickly.