Cape town stinks

We are sitting with a gas smell in our house and yard for almost 4months now and we are all getting ill and sick from this and the municipality has come out twice and said it's gasses and they can't do anything about it. I ask anyone out there to please help with this situation otherwise I will be cementing the drains closed and running my own drainage pipes to the streets and on refuge day the municipality can bring spades to shovel all the feces up.