I hope this email finds you well.

For electricity, please contact E.On on 0808 501 5200, or at Contact us | Help and support | E.ON (eonenergy.com)

Cold water is managed by Thames Water, you can find their contact details here: Contact us | Thames Water

For heating, hot water and cooling system, this is by Insite Energy, who you can reach on 03452414301, or at  Contact Insite Energy (insite-energy.co.uk).

Please let me know should you need anything further at all.