I don't know the details, but what it could be is that the password they gave you was a temporary one. When they say 'turn you off' it simply means deactivating the account as you have chosen not to use it. Some online wholesalers require a minimum weekly order. If they get the impression you will not be using the service they will not allow you to use the site. I looked at using Metz at one point and they gave me a password until I decided not to use them and so they deactivated it.
But as I say I am not sure of the details of how you discussed the account with whichever firm it was, but it doesn't sound to me like its detrimaental if you are not going to be ordering online with that firm and getting your flowers from a land based wholesaler. Don't be upset, am sure everything will work out fine
