The family of Catherine Wells-Burr said that they are "devastated by the betrayal" of Rafal Nowak who has been found guilty of her murder.
In a statement her family paid tribute to the. "inspirational, amazing, caring, kind, intelligent young woman."
Leanne, Phil and I are here today because of the cruel, callous, wicked, evil and sickening act of murder against "Our beautiful Catherine."
Catherine was an inspirational, amazing, caring, kind, intelligent young woman, who had her whole life ahead of her with so much potential after gaining her First Class Bachelor of Honours Degree in Business Management at Bath Spa University. We were all very proud of her and the person she had become.
The hatred shown to her has truly shocked us, especially the hatred shown by Rafal Nowak, a man who was meant to have loved her.
His betrayal to our family has devastated us. We treated him like a son and family member.
Anna Lagwinowicz has been devious, manipulative and calculating, her actions to create such sickening false profiles of Catherine demonstrate this and as a result these evil people have made us question our judge of character and trust in people - we trust no-one.
Our world as we knew it has fallen apart. Our lives used to be fun, full of laughter and love. We can see no future without "Our Beautiful Catherine". We are heart broken. No prison sentence will ever be enough. In this country life is not life and we feel it should be.
We are the ones facing the life sentence without her.
More top news
A funeral is to be held outside in the US state of Georgia for Bobbi Kristina Brown, daughter of the late Whitney Houston and Bobbi Brown.
Experts have warned that Ash dieback's impact on millions of trees could have serious consequences for the landscape and wildlife.
White House officials said that the US intelligence community has confirmed the death of Afghan Taliban leader Mullah Omar.