umm.... i'm not really sure what the contact us page has to do with your problem.... i would not go down that path... unless the contact us page does not work... but that is not the problem that you have referenced...
people frequently confuse SSL with curl.... they are NOT the same. you can read more about curl here: https://en.wikipedia.org/wiki/CURL
the link that you provided is closer to your problem, HOWEVER, that is for a local development server using XAMMP which is a windows server. if your live site is hosted on a windows server (and i'm not saying it is), then i would recommend moving to a new host.
i would enable the following link:
https://obiecue.com/extras/curltester.php
from there you can test your CURL connection to various other servers, including first data. that would be the first step, for me, to resolve this problem. if you can successfully make a connection to first data, we can then explore further.
best.
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