HJZ Plumbing

We had our bathroom done by HJZ plumbing back in March of last year, during the installation they caused quite a bit of damage to our property, and did an appalling job of repairing them. The actual installation work it's self looks even worse. The walls weren't prepared, boarded or skimmed properly and are un even bowed and have started cracking already. The window they said they could supply and fit was too small for the window hole. The bath and shower weren't sealed properly, causing water to ingress into the bathroom floor. Bath panel was fitted incorrectly, by a plumber not a qualified joiner. We've recently received a testimonial from one of the subcontractors and more pictures showing the butchered floor joists as a result of the plumber Henryk Zielinski mistaking cold and hot water. He's now stopped responding to emails and messages, the last couple of replies I did get were what I can only assume to be bible quotes. Very unprofessional and bad customer service.