If the variants do not appear in the variants listing of your product, it's because of some inconsistency in the data. It can be hard to see. For example, if you have a space in the characteristic value and not in the CSV or vice versa so hard to tell you from here, but there has to be a problem with your data.
You should try to add your variants manually. You won't be able to create duplicates. If the variant is already in the table, it will tell you there there is already an element with the same code. In that case, the easiest will be to edit the hikashop_product table via phpmyadmin, delete these variant entries from it and add them via the interface.