It matters whether you are still on an unpaid tenancy or have upgraded to a paid tenancy, even if you're only using "Always Free" resources for a total of $0.00 per month. Resources occupied by an unpaid tenancy may be deallocated without warning in order to satisfy a request from a paid tenancy. However, there's really no way we can know if the OP did or did not breach the TOS, which seems likelier given that they underline they were a paying customer.