Not a good enough response by the council. Monitor, monitor, monitor - facts & details.
What times, how many, how long for, describe the children doing the abusing, do you know their names or addresses? Exactly what is being said (by both sides), exactly what is happening, how it affects you and your family - write it all down for a week if it's every day, two weeks is the standard amount of monitoring to take it further.
In our council there's a section called Community Safety who deal with anti social behaviour by those who aren't council tenants.
Those who are council tenants are dealt with by landlord services. If your council sold all their housing stock, then it will be the local housing association.
Copy in your local police station - address it to their anti social behaviour unit.
Keep monitoring. If the abuse is bad, and since what you describe is constant "low-level" abuse which is bad, then they should take it seriously.
Expect to have to monitor for a long time, sadly. But for things to be done, the council and / or police need solid evidence to effect that actions.