worse service from Cashbuild ever

I am so angry and already posted on all social media about what Cashbuild does and dont take responsibility for there poor quality material then they visit our sites and speak to our clients without our presence and tells our clients that its our workmanship and that is so un professional of a business and im taking this to the top and i will never ever deal with such a arrogant and pathetic business ever and all construction companies will hear about this and the area / regional manager Brian is the main person that caused this unprofessional ism and he is so rude and when we contact him he denies everything and says we should email him and the customer told us everything and says how can Cash build be so unprofessional and over a simple lintol and look what is going to happen