Please Advice!! My Fiancee Hit Me But Has Promised To Change , Should I Go Ahead And Marry Him ?

My fiance and I are based in the UK and
have been dating for 2 years. We are
getting married in June this year and all
plans are set. I however got the greatest
shock of my life on Feb 14th.
He had came to my flat a day before and a
male friend of mine called me at night
while I was sleeping and he saw the call. I
woke up in morning only to be met with
accusations and name-calling. He even
threatened to call my people to cancel the
wedding and left my flat in anger.
I called my mum to report his behaviour.
My parents subsequently advised me to go
and apologize to him in order to bring
peace. I found out when I got to his place
that my mum had even called him to
apologize on my behalf.
As soon as I got there, he started the
name-calling again, calling me names like
ashawo, cheap, whore and the likes, and
before I knew it, this very calm man I
have known for the past two years turned
into a different person. He was behaving
like a completely mad person.
He locked the door and started beating me
and pulling my hair. He took out a knife
and threatened to kill me if I didn’t
confess that I’m sleeping with the guy who
called me on Saturday night. Some of my
braids came off, my dress was completely
torn and I had bruises all over. He ceased
my phone so I couldn’t call in the police
and held me hostage for close to an hour.
I cried the whole time, pleading with him
to free me. Just around that time, my
mum started calling me and he picked the
call and told her we just had a small fight
and I was crying. My mum asked to speak
to me and I told her everything that
happened.
Surprisingly, my mum told me these things
happen in marriages and I shouldn’t let
other people know our problems. My mum
said lots of women go through this once in
a while and I should stop crying and not
do anything that will bring about the
cancellation of our wedding.
He also started crying too, pleading that
he was very sorry and didn’t know what
came over him. I then left and came to my
place. He’s been calling and texting me
since then but I’ve refused to respond. I
am in total shock! I am also disappointed
at my mum’s reaction to all of this.
Honestly, I’m scared for my life because if
I go ahead to marry him, it might continue
and I have read about men killing their
spouses in marriages.
He is not a violet person usually though
and very remorseful about how he treated
me. What should I do? Should I cancel the
wedding or give him another chance. I
need your advice.