I had a new bathroom fitted recently. The plumber I hired to carry out the work didn't create a great impression whilst on site to say the least. I paid him in full cash, as most of the snags and issues were minor. Fast forward 3 weeks after completion of works and we have a major leak which has travelled through floors and walls to other parts of the house. I hired a new plumber to investigate and repair this but am not left with a heafy bill for repair works. The original plumber is not responding to my calls or texts.... What are my options to ensure he absorbs the cost of repairs?