A company allows eligible person to use their service at a discounted rate. Somebody would like to enjoy the discount but was not 100 percent sure about his eligibility. He then simply submitted the application, provided no fake documents, and the application was approved. The time was 2015.
That person needs to renew his subscription annually, and the most recent (and successful) renewal occurred on March 2017. Before that the T&C has changed, of which the person is not aware. Additionally, the T&C applicable to the every-year subscription is the then-effective one at the time of renewal.
On June 2017 the company decided to terminate the service to the person because they think he is not eligible. In the T&C the company does have the right to "verify the eligibility of the person and terminate the service to the ineligible at any time". However before the termination the person has made several successful payments (on a monthly basis), which are also accepted by the company. I may safely assume here that the company has approved the person's eligibility for this year's subscription? And since the most recent renewal there is no change in the T&C, and no change in the person's status since 2015, from which I would like to assume no reason for invalidation of his eligibility.
Is my logic legally valid?
Location: WA, United States