Roxanne has chosen a long brown human hair wig with highlights

Roxanne Hallett, 16, from Southampton, who is losing her hair, was distraught when a wig she paid for did not arrive.

When John T Haller, from New York, read her story on the BBC News website, he offered to let her choose any wig from the 123wigs.com site.

The firm has two New York stores, where clients include Calista Flockhart, Donatella Versace and Susan Sarandon.

The college student is now excitedly awaiting delivery of a shoulder-length wig of brown highlighted hair, which the store is ordering specially.

Roxanne told BBC News: "When I found out about Mr Haller's offer I was really shocked, it was a really nice surprise.

The teenager saved up to buy a wig on eBay but was left out of pocket

"The wig I've chosen looks like how my hair used to be and it seems like it will be a lot nicer than the one I originally ordered."

The teenager received abusive phone calls from classmates after her hair started falling out when she was just 13.

Doctors are still unable to explain her condition and now only 30% of her hair is left.

More than three months ago, Roxanne saved up to buy a $70 (�37) wig from a US seller on eBay - but she says it never arrived.

She said the seller e-mailed her repeatedly, each time saying the wig was on its way, causing her to miss the deadline to report the case to eBay.

When Mr Haller read about Roxanne's misfortune, it reminded him of his stepmother, who lost her hair after cancer treatment.

He told BBC News: "I'm a believer in karma.

"And I watched my stepmother, a breast cancer survivor, lose her hair as she underwent chemotherapy.

"Though she was very strong throughout and didn't say so, I know the change in her appearance was difficult for her.

"I can imagine it would be quite difficult for a teenager to go through losing her hair."

Many customers at 123wigs.com are recovering from cancer treatment and the company also supports the Lymphoma Research Foundation.