[HELP] I bought a domain in wordpress.com. Later, I realised wordpress.org would be the most suitable for me and bought a hosting and changed the A record in wordpress.com DNS to IP address provided by hosting, so I can access it via wordpress.org.

This is working for sometime. But after sometime, when I try to go to my website, it takes me to the wordpress.com website instead of the wordpress.org one that I now migrated to. When I go to the A record in DNS and click update DNS record, it works fine and takes me to wordpress.org website. But, after a while, again it takes me back to the wordpress.com website and I have to manually go and update DNS record everytime, so my website will lead me to the .org website.

Can any one please let me know what the issue here is and how I can resolve this?

Thank you in advance.