Cg Couverture

I used CG Cover in October 2018 to clean the facade and roof of my house. Both parties sprayed the cleaning product in a few hours. The product, told me the responsible, was acting slowly and its effect would be optimal after two months. In reality, after 2 months no task or trace has disappeared or even faded, the roof and the facade are in the same state. I repeatedly called the company asking him to iron and finish the job. No news despite numerous reminders by phone and SMS. I am very disappointed. Provider to avoid absolutely.