Hi, I am new to this and you are probably wondering why you can't transfer Pokemon in pokebank. I really don't like the system because it is annoying to use.
First off, it can be your wifi. It could also be that you are not saving after transferring the Pokemons. Third, maybe the Pokemon are hacked. Lastly, it might be that you ran out of days to transfer Pokemon and probably have to pay for one year which I believe is 5.99 dollars with tax.