Complaint - Mike Gregory Painters, Kenilworth

Last year we obtained 3 quotes for the painting of our Complex in Kenilworth. We finally chose Mike Gregory Painters. After the work was completed, I noticed spots on my outside Polycarb Patio Roof but it never entered my head that it could be paint. After I had the roof cleaned, the marks were still there so had the roof cleaned again but the marks were still there so the guy told those marks are actually paint as he is a Painter himself. I then phoned Mike Gregory who told me they are very busy so it won't be soon that he can send someone. After a few calls to Mike, he sent his Foreman who arrived with a clear plastic bucket with clear liquid in. The first thing he said looking at the Patio Roof was, that is not our paint and the guy that came with him, agreed that it is not their paint. However, he used liquid from the bucket he brought to clean a spot on the roof so the marks were gone. He then said the guy who cleaned the roof is lazy and did not do a good job because he just used water to clean that patch. I apologised to them for wasting their time. After speaking to our gardener who cleaned the roof twice, he said he saw them arriving with a container of Thinners so it was not water that was used. I then phoned Mike Gregory to inform him of the deception and asked him to come and have a look for himself. He once again told me they are very busy and that the guarantee had expired which it had not, as I have evidence to prove that. He then said there will be a callout fee to come and check which I found odd as it is his Company's work. I asked what the callout fee was but he did not respond and did not take my calls either. I reported the matter to our BC Chairman. Mike Gregory works in the area so he would not have been going out of his way to come and have a look but he did not want to for obvious reasons