If your plan got expired, you can easily reactivate it in the dashboard of your Zyro account:
1. Log into your Zyro account
2. Go to the Subscriptions page
3. Find the expired plan and click Reactivate:
4. Complete the payment
Discount codes don't apply when reactivating a plan; if you want to use a discount code, you can do that by purchasing a new plan
Domains cannot be reactivated, they should be registered again; learn more: What happens when a domain expires?