penno mate, stay away from people like that.
Don't even be the slightest minute bit worried about her talking about trading standards because as you have only given her a quote and shes not had the job done, trading standards would only say "well whats your problem then" don't use him if you don't want to pay that amount.
Trading standards will never do a thing over someone thinking you are over priced on a quote, even after the work was done, as long as the price still reflected the initial quote there is nothing anyone can do about it.
They entered an agreement\contract, you upheld your end and they paid, end of story.
Don't even give her the time of day with another phone call, they simply ain't worth your breath.
