Hi i have noticed problems with logging into myunisa, this happens occasionally.
i suspect its their server or some other type of capacity issue.
if you struggling to get into myunisa try using the mobile site, or download the mobile app
Those of you struggling to log into myunisa, use the unisa mobi site
i have been using the method for some time now, and its quite effective when the web page is down, also you get access to everything you would normally get, that includes your email and other documents. so you dont miss out on anything!!