@Irfankhan1
Keep the phone turned off, open all the flap covers and remove SIM and SD cards. Then place the phone in a well-ventilated area (or in a bowl of rice) for 48 hours. Try to turn it on and see if it's fully operational, if not, then sadly you permanently water-damaged your phone.
Just to correct your information, here are some parts of the official Water Resistance guide by Sony:
Your device has an IP rating. This means that under a strictly controlled laboratory environment, the hardware works as designed even after being exposed to specific conditions.
Sony devices that are tested for their waterproof abilities are placed gently inside a container filled with tap water and lowered to a depth of 1.5 metres. After 30 minutes in the container, the device is gently taken out and its functions and features are tested.
The IP rating of your device was achieved in laboratory conditions in standby mode, so you should not use the device underwater, such as taking pictures. Do not use the device to take photos while performing any type of activity underwater, including diving or snorkeling.
