there will be a councillor with responsibility for environment issues write to them
google lead member (careful) environment or council portfolios, cabinet portfolios should be listed somewhere on council website
quote your stat’s and lack of action, keep a diary – officers will be limited on funding and are probably telling councillors don’t have resources, ultimately the councillor has statutory responsibility so their answer will be carefully worded
used to have a problem neighbour burning wet garden stuff all day long plus throwing rubbish on – speaking too him was a waste of time – daft old guy, died so that sorted it but was a complete pain