You will be contacted shortly. What is implied here and does it mean today or tomorrow?

Unfortunately, it is unclear what is implied. The term "shortly" can have several meanings. It may or may not mean today. Or tomorrow. It might mean a couple of days, or three or four days. The rough translation is most probably "a few days" from now. It probably does not mean in a week or two. But you're stuck waiting for them to show you what they mean - unless you ask them.