Faulty link

The worst ever, I called the call centre 5 times today 03/05/24 and my issue is still not resolved,calls dropped and being placed on hold for more than 30min spoke to same agent twice by the name of Portia. My issue is I consulted telephonically and I was sent a link to access sick note , link is faulty and reads”Syntro, please note the document you requested cannot be found” I sent numerous emails to ***