Design Help

I have purchased a subscription, but i designed my page in a trial version. How do i copy the page i designed and move it to my subscription??

Well if your subscripton is less than two weeks old, cancel it and activate the trial you built. You can't move the trial version to another account.  If you purchased a custom domain, that can be moved to the activated trial. If you need any additional  help let us know. 

This explains how a trial (which is actually 21 days long) works:

https://paigebrunton.com/blog/squarespace-free-trial