I might be a little bit late for this thread, but you might have a case under the Consumer Right Act 2015. The Act says that the goods must be of satisfactory quality that a reasonable person would accept given the price. In other words, if a similar product from another photographer would be £100, your photographs and DVD should be considerably better than that for £375 - a Rolls Royce is subject to a higher level of expectation of quality than a Ford. Under the Consumer Rights Act you have a legal right to reject goods that are of unsatisfactory quality, unfit for purpose or not as described, and get a full refund, but you have to do that within 30 days. After that, up to the first six months you have to give the seller the opportunity to repair or replace the item instead of the refund - but you can state a preference for a full refund. I'd guess that if you're outside of the 30 days, then repeatedly asking for a replacement of appropriate quality will soon make them fed up enough to offer a refund to make you go away. I would also suggest contacting a more reputable photographer and asking what they would charge for the same stuff to get a benchmark for your "reasonable person" test. Disclaimer: I am not a lawyer, you may want to seek proper legal advice before doing any of this.