removing a site from wix

Hello, I have the site http://www.vortexsocialmarketing.com/ they asked me to redesign the site for them. Right now it is wix but the domain is registered to ipage. A whois shows the dns is pointing to ipage. But the content shows the wix site. How do I change this so that I can install wp here and redo the site?In the cpanel for ipage the a record is pointed to a ip belonging to wix but I am not sure if this is what needs to be changed or not. The wild card is also pointed to a wix ip.

vortexsocialmarketing.com 216.185.152.159

* 216.185.152.159
If i delete these can I install wp and go as normal? Thanks so much in advance. I should add the content is not important to keep