Change your phone number, block his email address, eliminate any other contacts you may have from him.
And most importantly, don't be a victim. Focus on self improvement. Find where you collaborated with him against yourself and find ways to change those parts of your personality for the better.
Don't cry, don't regret and don't blame
Weak find the whip, willing find freedom
Towards the sun, carry your name
In warm hands you are given
Ask the wind for the way
Uncertainty's gone, your path will unravel
Accept all as it is and do not blame
God or the Devil
~Born to Live - Mavrik~