Bad Workmanship and Not Honouring Guarantee

I had my house painted in June/July 2014 and 6 months later all the problem areas have reappeared. I took on UHI Projects because of the guarantee on paint and workmanship. since April 2015 they have been promising to come and sort my problem out, to no avail. now their contact numbers don't work and their website is gone.<br> Please avoid them at all costs.