How do i get in contact with first utility? Contact Information for First Utility. You can get in touch with First Utility on our supplied telephone number, 0843 770 5059. This telephone number will put you in contact with First Utility customer services, where you will be able to be directed to the customer service department that you need.Who is first utility? First Utility is the UK’s leading independent energy supplier. They serve over 5 million domestic and business customers across the United Kingdom. We have published contact information for First Utility at our First Utility contact number page.How do i login to my first utility account online? If you are a new or existing customer of First Utility, you can login to your online account to carry out a whole host of tasks that you would otherwise have to do over the phone. You can access your account by using your username, account number or email address.How do i contact shell energy from first utility? Former First Utility customers can call the customer service team on 0192 632 0900. Your call will be automatically transferred to the new provider, Shell Energy. You will listen to an automated recording. Select one of the following options depending on your query: For energy enquiries, press 1. For broadband, press 2.