Site loading on port 443 and not on 80 - html

Question

I have site which isn't really working properly on SSL certificate.
The website works properly on 443 port with SSLEngine off directive in my configuration file, with SSLEngine on is responsing with 503 Error.
It also connects on port 80 by default and I don't really know where to change that because everywhere I have set port 443.
.htaccess file:
RewriteEngine On
RewriteCond %{SERVER_PORT} 443
RewriteRule ^(.*)$ https://www.antoszbk.xyz/$1 [R,L]
configuration file (while working properly):
<VirtualHost *:443>
ServerAdmin xxx#xxx.com
DocumentRoot /var/www/html/index.html
ServerName antoszbk.xyz
ErrorLog ${APACHE_LOG_DIR}/error.log
CustomLog ${APACHE_LOG_DIR}/access.log combined
# SSL Engine Switch:
# Enable/Disable SSL for this virtual host.
SSLEngine off
SSLCertificateFile /etc/ssl/certs/www.antoszbk.xyz.csr
SSLCertificateKeyFile /etc/ssl/private/www.antoszbk.xyz.key
<FilesMatch "\.(cgi|shtml|phtml|php)$">
SSLOptions +StdEnvVars
</FilesMatch>
<Directory /usr/lib/cgi-bin>
SSLOptions +StdEnvVars
</Directory>
BrowserMatch "MSIE [2-6]" \
nokeepalive ssl-unclean-shutdown \
downgrade-1.0 force-response-1.0
# MSIE 7 and newer should be able to use keepalive
BrowserMatch "MSIE [17-9]" ssl-unclean-shutdown
</VirtualHost>

Answer 1

The solution was in DNS Server Configuration.
Certificate given to me by provider was set to antoszbk.xyz alias but in my SSL configuration I set it up to www.antoszbk.xyz. Still receive an error if trying to connect by IPv6 (AAAA record) redirection but it is a matter of time for the DNS to process it.