I purchased an iPad Mini Retina, I had an account issue early on that caused them to delete and recreate my account. After this account change on their side, I lost lost the option to have the free 200 MB on my account. Here is what solved it for me and will likely work for others having the same issue.
Paying for data worked. When it expired, I never got my free data back, the account would switch to no data pass.
After a few hours on the phone, in store and even having the case escalated. What finally resolved the problem was ordering a new Nano SIM card from the website for a penny, inserting it into the iPad, choosing the option to create a new account (making sure not to select an option related to logging into an existing postpaid account) and the selecting to login using my existing account after choosing the option to create a new account. It’s very confusing at that point during the activation. But that small difference is what cause my account not to get the free data. Hopefully this information helps anyone else having the same problem.