I have 4,748 credit after completing cohort 17, but its says "You're 4,648 credits over the rollover limit - use them by Jun 21." is there anyway to extend the trial date, so I have more time to play and use the credits or am I bound to lose them?
Unfortunately, trial periods can't be extended, and any credits exceeding the rollover limit will expire on June 21.
For monthly subscriptions, credits roll over up to 2x your plan's limit. Since you're on a trial with 1, 000 credits, the excess 4, 648 credits won't roll over.
To keep using Clay, you'll need to upgrade to a paid plan before your trial ends. When you upgrade, your new credit allotment will be added to your current balance.
If you need further assistance, you can request human help by clicking on "Talk to a person."