I am a Wiccan. Firstly, your daughter is too young to be a Wiccan. It is an initiatory mystery tradition and no genuine legitimate coven will take on anyone under the age of 18. Some even put an age limit of 25 or older. Wicca is a bit like the Masons or Catholicism - until you've been initiated you aren't 'it'.
That doesn't mean that your daughter can't learn about Wicca and paganism in general. That will give her a very good grounding when and if she does want to start looking for a group to join. There are also other areas which she may find offer a fulfilling area of study whilst she's in her teenage years - things such as astronomy and astrology, history, gardening and outdoor pursuits, etc.
The Children of Artemis website may be a good starting point, though they can veer towards what is known within Paganism as 'fluffiness'. There are a lot of younger people on that site and they offer each other support. If you're daughter is sensible she will soon learn to differentiate between the pink fluffy unicorns and the more spiritual aspects. The Pagan Federation are also a good first point of contact.
There are a lot of pagans in the South West, some sensible, some a little bit more, erm ..... eccentric (!)
I dislike the town centre in Glastonbury, but Chalice Well is lovely (run by Christians but respectful of other beliefs) and the Tor is lovely if the local sewer-scum haven't been using the tower as a toilet.
The Witchcraft Museum in Boscastle is run by very sensible pagans and they may be able to help if you're in the area.
If you're in Devon/Cornwall then the local Pagan Federation page is here I don't recognise any of the names given as moot contacts and the information may be out of date, but perhaps someone there can help you.
If you're in the Wessex (Bristol/Gloucester/Bath) area then the Pagan Federation link is here I recognise some of the names and they are very down to earth and sensible.
I'm sorry your daughter is having a tough time of it. There are plenty of spiritual counsellors, shamans, soul retrieval specialists, etc. but I guess that most of them would be wary of taking on someone so young as a patient. "Counsellor" is an unprotected title - that means that anyone can call themselves a counsellor and set up in business, so do be careful.
The Wiccan teachings around death are that our loved ones go for a period of rest before reincarnation. The Hallows prayer (published so I'm not giving anything away) says that we shall "meet, and know, and remember and love them once again".
If I can be of any further help then please drop me a PM and I will do my best to help.