R&D technologies are scam artists. Caused serious water damage and have since ignored me.

In november I bought a Granducha instant shower. R&D came and installed it. The device worked fine for a month and then a leak formed between the wall and the tiles. It has spread to the floor and the water damage has been increasing since. Using the whatsapp number of R&D, i explained the situation and sent video clips as per request. They said the technician would contact me. He has not contacted me, does not take my calls and does not answer my texts. The same goes for their main contact number. Horrible experience.