Large skip dumped in canal walk for 5 weeks

A house in Canal Walk has been having building work done and has had a large skip parked outside of our bedroom window for going on 5 weeks and the builders refuse to move it. I do not see why we should have a skip relating to someone else's building work dumped outside of our home for 5 weeks. It generates lots of dust and makes our house exceedingly dirty and dusty. We were initially told that it would be outside of our home for 1 week and it has now been 5 weeks. The builders dump lots of pieces of wood and materials right outside the front of our window and we have simply had enough of their taking advantage of the situation. We have tried talking to them and enquiring, but we are finding ourselves completely ignored. I would like the council to investigate and compel them to remove the skip or place it elsewhere.