Identification: Very sorry looking plant in need of tlc, but I don't know the ID of it...

Hi everyone! I'm new to this so sorry if I make a mistake somewhere...

http://imgur.com/a/eBai5#i2uUhXJ
Above is a few photo's of the plant. When it was healthy it had not bolted like this, it was still very tall, but full of leaves and had many flowers like the example picture at the bottom of this album. The flowers secreted a noticeable amount of sugary nectar too that formed droplets on the petals.
I know you can snap off branches off it and they will grow a new plant. Also, it was very thirsty in the summer and grew twice it's size in 4 months!
I want to know the name of this plant so I can prune it back properly and make it healthy again, I am also going to use the cuttings to make a batch of new plants to give away.
Thank you to anyone who can help!
Joe.

 

Impatiens species.

http://www.strangewonderfulthings.com/266.htm

 

I managed to find that much but it looks nothing like those pictures minus the flowers and leaf shape... The plant is nearly 5ft tall and has a waxy green succulent type stem... Those pictures are of a very woody looking stem base :/
I can't use a care guide for a plant with such a different stem system can I?

 

http://paulshirleysucculents.wordpress.com/2012/06/23/impatiens-tuberosa/

Looks as if yours is cutting grown and won't develop a tuber.