saas 3 bugs

I.
I tested the SaaS with steps:

1. Get started

2. Sign on the site

3. Stripe to pay

4. No payment

5. After signing in, there's only one plan to choose from, and it's NOT the one that was picked. There's a plan not connected to the SaaS, and after selecting it, an error occurs.

No welcome email sent, nothing. How can we actually know if someone signed up but hasn't paid yet?

II.
I have done a new sign up, went to stripe and submitedd with a 100% discount coupon (that i created on stripe) and i have this in client view (photo)

III.

https://youtu.be/BS3gEVYqUEI