Pro site not working/not reliable

i want to build subscription website but, pro site not really reliable. for example, when i set payment as manual, it is only activated if i pass the activation link(manually to the user) then the pro site activated. if i manually activate using activation code on dashboard, the client still cannot access the site. {very frustrating this part}

secondly, i tried using paypal express. i tried with my user that has account already, and I can go through the payment process flawlessly for the second site. but, for a new user, after they made payment they dont receive any email and the site not activated. {this part even frustrating}

So, pro site not reliable and frustrating for a premium plugin.

Im thinking to take a look at membership 2 pro. but i need to relearn and resetting everything.