You can easily report Dave's Ices using the West Berkshire Council web site.
The URL is
https://www.westberks.gov.uk/article/37092/Report-a-Noise-Nuisance
You will need Dave's Ices Postcode.
His full address is:
D A Beazy
242 Overdown Road
Tilehurst
Reading
Berkshire
RG31 6PP
0118 942 7984