Hi @VidaTB, welcome to our forum!
You can try and use the Google service called "Find my Device" to set a new screen lock on your Xperia V and see if that works.
Otherwise you will have to perform a software repair using Xperia Companion to remove the screen lock from your device and this will delete all data stored on the internal storage of the device.
Let me know how it goes! 
0online
1869089posts