Toyota Corolla Engine Oil Leak Reoccurred on New Vehicle

I purchased my brand-new Toyota Corolla 1.5 Dream approximately 13 months ago from Toyan, an authorized Toyota dealership in Ankara. Shortly after the purchase, an engine oil leak developed. I was informed that the issue was caused by a faulty oil seal and the repair was carried out under warranty, with the assurance that the problem had been resolved. However, before long, the same oil leak reappeared, even though the vehicle had only traveled 11,700 kilometers. The recurrence of the same critical issue in such a short time on a new vehicle has caused me to completely lose confidence in my car, and I believe I was sold a defective vehicle. Because this problem has recurred, I am seriously concerned that it could lead to more significant mechanical failures in the future, and I no longer feel safe or confident using this vehicle. Therefore, I respectfully request that my current vehicle be replaced with a new, defect-free vehicle, and I kindly ask that this matter be thoroughly investigated and that my grievance be resolved as soon as possible.