Press 4 to skip past the pre-recorded junk at the start of the phone call.
WBC's web page at http://info.westberks.gov.uk/outofhoursemergency says this number is not for noise nuisance reporting.
This is not the case. For more information on using 01635 42161 have a look at this other WBC document http://www.westberks.gov.uk/media/doc/2/t/08(05)_Appx5_Audit_of_Crime___Disorder.doc which gives a better description what you can use the number for.
It is WBC's responsibility to deal with noise nuisance and also to regulated and deal with criminal activities of Ice cream van salesmen. WBC will try to fob off the public and and try and avoid their responsibilities any way they can.
Report Dave's Ices when ever you can. The sooner this crook is dealt with the better.
Ask for a report reference number at the end of the phone call.
You can also report Dave's Ices on this WBC web page http://www.westberks.gov.uk/index.aspx?articleid=28063
If you prefer to use email use this ehadvice@westberks.gov.uk
01635 519192
You can write a letter and post it to
West Berkshire Council
Council Offices, Market Street, Newbury, RG14 5LD