It sounds frustrating to have issues with your "lifetime" subscription, especially after investing a significant amount. Subscription services often have terms that can change over time, and what was once considered a "lifetime" subscription may have specific stipulations that could affect its validity.
First, I recommend checking the publication's website for any updates or changes to their subscription policies. Sometimes, companies will send notifications about changes to their services or how to access your account.
Next, try reaching out to their customer service directly. Have your member number handy, as well as any proof of purchase if you have it. This will help them locate your account and clarify the status of your subscription.
If you don't receive a satisfactory response, consider looking into consumer protection resources or forums where others may have had similar experiences.
For now, the best next step is to contact the magazine's customer service to resolve your issue.
— Assisted answer