I had an interview for a internship last week. They told me, I will get the internship and I will get an email from their recruting manager "the next days". Now 9 days have passed and I haven't recieved anything so far. The internship should start (if they choose the time span I wrote into my application)
Should I (is that professional?), and if yes, how should I ask them about that mail (containing an official confirmation and more detail, when I should start, when I should come to work etc)?