Payments made to a phone number or UPI ID (VPA)

What if I’ve sent money to a wrong phone number or UPI ID (VPA)?
What if my payment is successful but the money has not reached the receiver?
Can I cancel a successful payment I made using a phone number or UPI ID?
How does the receiver know into which account the money is deposited?
What if the money is not deposited into the receiver’s account instantly?