Inferior workmanship, worthless guarantee and no customer oriented service

I contracted H20 ROOFING AND WATERPROOFING to paint the roof of my house in March 2021. After the winter rains I noticed that the new paint is peeling of certain area's on the roof. It is apparent that the preparation work was not done correctly. I have been trying to contact the owner Rowland Mayer numerous times Since August 2021 to come and repair the affected areas. Initially he only made promises to come and have a look but then never honor the appointment. Lately he does not answer my calls anymore and ignore my messages. According to their website they offer a 5 year workmanship guarantee. I would advise anybody not to make use of H20 ROOFING AND WATERPROOFING as their guarantee is worthless and the quality of work inferior.