Let's start with this:
"It got my account not only limited but deleted by PayPal and PayPal told me via the same email that the amount would be returned to whoever sent it after six months. So basically, I did not receive the $200 he sent."
There is no way to prove why your account got limited
@kazmiwajahat. I've had an account limited and the sender as well as myself were 100% legit. There is just no way to prove why yours got shut down.
This part "I agree that he bought me two things - One was licensing system and the other was a captcha plugin - Both of which for the same bot but I did not receive the captcha plugin while I did not use the licensing system.
He bought them for you and you should get them.
@neilbhabuta is there any reason you did not give him the plugin and does he have access to the licensing system?
A reminder: Let's keep this on track and forget the bickering.
This is a business transaction, not a daytime soap opera.