Shoddy work lack of accountability!!!!

This contractor installed windows and alluminium doors for me closing off the patio, What started as a great project has now turned very ugly. Two weeks after the installation the rain poured through into my dining room damaging my persian rug. OBey came out and put silicon everywhere in the process messed brand new tiles with the silicon and left ugly streaks inside and outside. He has been back a few times each time just sealing with silicone. The rain continues to pour through I send him pictures and he promised 2 years gaurantee but its not even been 2 months since the installation. He now wont answer my calls and Im stuck after paying R35000 for this project with a leaking structure!!