Be careful of Hydro Rubber Potchefstroom

Got a quote to do waterproofing at my home in Potchefstroom from Mr Dawid van der Merwe, the local agent for Hydro Rubber. Gave me a massive quote to waterproofing. Paid him in ful after he told me he completed the work-only to find that all the leaks in my roof are still there and even worse than before he started with the work. Now when contacting him, typical of a *****ster he ghosts you and doesn't answer or return my calls nor pitches up for appointments that he said he would.