I see the only paid SSL provider is GoGetSSL. But, can i include another provider? The same question for domain. Also, do I have to manually update the SSL (even i buy GoGetSSL 5 year plan) every year?

The speech_2_dymo folder on your site contains a .htaccess file which contains a snippet to force HTTPS. If you don’t know or care about those rules, you can just delete that file.