Do not buy from this company .Total rip off. I had...

Do not buy from this company .Total rip off. I had windows fitted 4.5 years ago which are now failing due to bad fitting. Had 1 piece of glass replaced and the fitter told me the piece that had failed was illegal as it was not double toughened as it should be .This is the same in all the panes and now I am having problems with the company getting them replaced to legal requirements.