We're sorry that you're experiencing this issue!
We would like to suggest reaching out to Google Play Help
or Apple Help Center https://support.apple.com/en-gb/HT201266 for better support, as all payment processes are handled by the app store itself.
Please kindly reach out to us through our Help Center. We will check the payment process for you and will get back to you as soon as possible with a solution.
We hope it gets resolved soon so that you can join us for the Unlimited experience!