Please help me i don't know what do to. My friend installed the app and i sent him a payment using the address given by the app without knowing the address is changeable. I sent the bitcoins to this address: 1LtVLn1iGrem6W7vVRz8H48HbJZrbWzFCK. The date was: March 7, 2017. The amount was 0.23985547. The bitcoins was not transferred to him.
Please help me as soon as you can, Thanks in advance.