Rawson pavers

I used this guy to pave a small area and after the first rain the black pavers turned white because he did not brush off the cement that was used. When i asks him to remove the cement dust, he said that will be fine. The paving looks terrible. He promised to come back and repair it, he has been avoiding my calls and after 5 months, haven’t heard or seen him. I will now have to get another company to repair his **** work. Never use this guy no matter what he promises. His name is rawson and his number is 0623303969 and he advertises on gumtree and Facebook in randburg.