Change to Start Date

I need to delay the start date by 7 days due to cashflow - if this is not possible then I will need to cancel the switch and remain with my existing supplier (where there is considerable credit on my account) but there is no clear information as how I action this.

Click “Help” above, search for “Change to Start Date”.

There’s lots of clear information in the knowledge base. I’m not sure why everyone seems to find it so hard to locate?