The function of park domain is to show content of the site you parked the domain on from that domain.
I would recommend adding it as addon domain and moving all contents from old site to new.
I am not able to find that your site is pointing towards infinityfree nameservers.
Note that nameserver propagation take upto 48 hours. But in some cases it take about half an hour.
The whois shows your nameservers have changed, however my dig gives a SERVFAIL error, meaning it can’t test your domain, so like @MAHOfficial said, wait a bit and try again, as your nameservers have not propogated yet
Okay, check it out now, your domain is now working however, there is no index.html inside.
Please add an index.html inside the htdocs folder or, if you see an techdiwane.com folder at the first page and inside it you will see a htdocs folder… just move or upload the files inside techdiwane.com > htdocs, not or instead of the first htdocs.