So, you will remove all the changes you did in the subscriptions.php and only replace
return __( 'You must purchase a pack before posting', 'wpuf' ); with return apply_filters( 'wpuf_pack_notice', __( 'You must purchase a pack before posting', 'wpuf' ) );

Now, put the 2nd snippet in your themes functions.php. I’ve given you 2 sample sentance in that 2nd snippet for logged in and logged out users. Modify them and insert your own sentence and customisations. Makes sense?

Update: to your last question, you can’t identify the user if they purchased any pack previously.

Thanks again Tareq and I have already done this and it seems to work! Thanks for your help and sorry for nagging.

Now the final problem I’m noticing is the one I just mentioned. We have 3 packages

FREE – 1 post, 1 day
Standard – 2 posts, 30 days
Premium – 5 posts, 90 days

However, the FREE posts is causing a problem as its only letting people but this package once. Why is this? If they have ordered a package they can’t order it again after?

Yes, they can only order a free package once. Otherwise users can use the
free package multiple times a day and abuse the package system 😉

Is there anyway for me to set it so they can reorder a free package only after an existing free package order has expired?