If you want to change the cPanel password, then this can be done by logging into your secure client area: https://www.havenswift-hosting.co.uk/clients/clientarea.php
Unlike some configurations of cPanel, you are not able to update the password while logged into cPanel.
1) Once logged in, click on the "My Products & Services" link in the menu section.
2) Then click on the "View Details" button for the hosting account you want to change the password details for and from here you can view the cPanel account name and also the current password and beneath this, you are able to change the password if required. The password that you choose must register as 'Strong' for it to be accepted