Do you see the invoice for that here, https://dash.cloudflare.com/?to=/:account/billing?
If not, that means you probably purchased it in a different account. Two different sets of cloudflare nameservers is a very good indicator you are logged into the wrong account. Check the domain has nameservers here, DNS Propagation Checker - Global DNS Testing Tool. If the two you see on whatsmydns are not the two you see shown on this page, https://dash.cloudflare.com/?to=/:account/:zone/dns then you are most certainly in the wrong account.
The only way you’ll be able to regain access is by having access to the email address of the other account. I’d start with this link, if you don’t know the email. Do that and then check any other email accounts for an email on gaining access. This link may help, but it only work when logged out, if you don’t know the email: https://dash.cloudflare.com/forgot-emai
If the above does not help you resolve the issue, you’ll need to follow these directions here, Billing, Plans & Subscription Questions. The Community cannot assist with Billing, Account, Trust & Safety, nor Registrar issues, you need a case with Support.
