Blocked storm drain

This has been overflowing on and off since January. The water pours off the hill in bow. brick Hill. Drains at the other end of the village by the hill have been cleaned but therefore the mud washes further down and get stuck. This has been like it at least 2 months if not three. There is a further drain as you go down towards the level crossing that is also overflowing from the same problem which I've also reported. Anglian water is not responsible for these drains. They have been out and inspected. This one is particularly urgent as it is next an electric utility station. It has had sandbags around it since Christmas.