A. First, ensure that your app is updated to the latest version. Go to the App Store, search for Trendyol, and check for updates. If an update is available, install it. If the app continues to crash, try restarting your iPhone by holding down the power button and sliding to power off, then turning it back on.
B. If the app still crashes, try uninstalling and reinstalling it. Press and hold the Trendyol app icon until it wiggles, then tap the 'X' to delete it. Go to the App Store, search for Trendyol, and reinstall it. This can help resolve any corrupted files causing the crashes.