They aren't actually new, from what I found:
Site was registered at 2013
Twitter: 2014
Facebook: 2013
Youtube: 2015
Ofc they could just buy an old account and change the credentials so for safety, I did a google search but this time I set the dates to 2013-2016, boom! found some articles from that time and some of them are even from reputable sites e.g. coindesk, cointelegraph. However individual reviews are mostly from twitter and facebook which dates are recent, lots of them are complaints.
It's no wonder that you haven't heard of this cause I too! This seems to be a local exchange for the residents of south america (but is also accepting ppl around the world???)
@op, upon checking their whois, I found a name and an address
Dear Potato Chips

At first, thank you very much for your research job.
When I transferred my ETH to the bitINKA, I searched the Internet for any reviews. There was a little count of information about bitINKA, including very old opinions from 14-15 years. I have not found something strange or terrible. Such a large number of users negative experience arose last month.
I found their instagram, found their faces, but I do not know what to do. They do not answer me on a facebook, they ignoring me on a email. I do not believe they did not see this thread.
I'm desperate. Seems to me, they stole my money.