I had my house walls and ceilings skimmed in October 2011 and since then I have had a huge amount of hairline cracks appear more and more each day. The guy came back and scored out and refilled with Polyfilla and was advised to leave for 5 weeks well only one week has been and gone and so far alone I now have an additional 50+ new hairline cracks. He has now stated that he will remove all the plaster he done and will replaster using new plaster or he he will pay to have the walls lined as-well as the ceilings. I stated that there is no gaurantee that 6 months down the line the same thing wont happen again and no he couldnt promise this. Where do I stand if I want a full refund?