We have answered all of your support requests. Your license was associated with the identity of a different person (which I can't disclose here for obvious privacy reasons) because you purchased your license with the PayPal account of that person. Then you (the other person, actually) asked us to transfer the license to your identity. We performed the transfer and of course we answered you. Your license is correctly assigned to your identity and associated with your email address (the same you are using on this forum) on our server. I have just checked it and it is perfectly valid. Actually, it has been activated several times.
Please make sure that you can receive notification email messages sent from our corporate email server (@pixinsight.com). Check your spam/junk email folders. Make sure that your email provider is not blocking us, or some of our email notifications selectively (license activation codes, being apparently random character sequences, are often interpreted as threats by low-quality spam protection systems). You are a licensed user, and all of the problems you are describing are being caused by email reception issues at your end.
I strongly suggest you to associate your license with a different email account. Please don't use a Microsoft email service (hotmail, outlook, msn, etc), or you won't be able to manage your license. As two well-known examples, free Gmail and Yahoo email accounts work perfectly with our licensing system.