Products OK but Doesn't follow Trading Laws of UK

Kelly, the owner of the shop is nice in person, but will not follow trading standards regulations for distance selling regulations. After waiting a long time for my order, I decided to cancel since it was too late for me to use the dance items. The parcel was shipped the same day I cancelled even though I cancelled before trade hours (for the store and post office). Kelly told me I could return my items, and I did this in person and she promised to process the refund. It turns out she will not only wait as long as humanly possible to do this, but she will not refund the full amount for the cost of the items. This is for "restocking", but is also now illegal by trading standards. When I communicated with her, she promised to issue the rest of my refund after reviewing the laws and seeing that I was correct. However, no refund ever came. She also never changed the terms and conditions of her company as required by law. The rules are very out of date. She is not an honest person to do business with, so be careful. She seemed so nice in person and it was a shame to learn of her less honest qualities because I will need to do all furture business elsewhere.