Bad service

I bought a chest of draws through Lewis end of March. The cupboards draws pulled loose 2 weeks after I got it. I went back to them to report it and they promised to send someone out the next day.. I paid the first instalment on the 1 April and told the to come sort out the draws. I have since been there 4 times and still they dont send someone out. Im really frustrated. I keep calling them and dont get any assistance. Its really poor service.