Kingsgate are a recognised firm so I am sure that Vanguard are fine.
Did you speak to more than one company? If not then I suggest that you take more advice before taking this big step.
Sharing from experiences of dealing with debt
The greatness of a man is not in how much wealth he acquires, but in his integrity and his ability to affect those around him positively.
Bob Marley. http://kallis3.blogs.iva.co.uk
If you have any doubts about the legitimacy of this company then put the brakes on for a few days while you give it some thought. We always advise a chat with several companies in any event, to compare advice and see who you feel comfortable with.
My opinions are merely that .. opinions based on experience. Always seek professional advice.
IVA Completed 23rd July 2013 .... C.C. 10th January 2014