Vestel TV Connectivity Issues and Unresolved Complaints

Approximately 1 month ago, I made a big mistake and purchased a Vestel television. The installation was done, and for the first 2-3 days, the internet connection was intermittent. On the 4th day, the connection was completely lost. After insisting, a device replacement was finally made with great difficulty. We received our Toshiba television, installed it, but still no connection. We even tried on our own mobile devices, but the television is not connecting to the internet. The solution they offered was to change our internet, even though other TVs in the house, such as Sunny and LG, can connect to Wi-Fi using our phones. We finally managed to involve the factory. While waiting for the technical support from the factory, 4 days passed. Despite confirming that they would come today or tomorrow, there is no one coming or going. When I called today, I learned that they gave the same service phone number again. The technical support expected from the factory has been directed to the same place. I called them, and they said it would be the same. The service, repeating like scolding a person, says they are waiting for news from the factory. In a way, they are saying you don't understand. The factory directs the service, and the service directs the factory. Reaching the end of my patience, I requested a refund. Some say the service will come and check, and then it will be refunded. If that's what they're going to say, why didn't they say to change the internet connection repeatedly instead of saying it will be refunded? Some say we have filed a request. I look at the result and say the TV is not connecting to the internet, I want a refund. The 15-day refund process for the product purchased online was spent due to the service. The product was replaced with another TV, but the problem is the same. Please don't distract me anymore, 2 products are defective and not fixable. I am complaining and urgently requesting a refund. I don't want to be directed from one place to another, delayed.