Need Advice: Possible Case For Not Honoring Membership Terms At A Private Golf Club

I'm looking for some advice regarding an issue with my membership at a private golf club and whether I might have a legal case against them for not honoring the initially agreed terms.

Background: In 2018, I joined a private golf club under a premium membership level that provided access to multiple clubs and included specific benefits like reduced cart fees. A few years later, due to an injury that prevented me from playing golf, I temporarily downgraded my membership to reduce my monthly dues, based on the assurance from the club’s senior membership director that I could return to my original membership without any additional fees.

However, the club has since discontinued the premium membership level. When I requested to be reinstated to the equivalent benefits or at least receive the original membership cart pricing, the club denied my request. They responded by stating that the initiation fees for all types of memberships have significantly increased, and implied that I am receiving a fair deal since I paid less than what new members are paying now.

Issue: The club is not allowing me to return to my original membership level or offering me comparable benefits, despite a clear written commitment that allowed me to downgrade temporarily and revert without extra costs. Their argument focuses on the fee increases for new members, which seems irrelevant to my situation.

Question: Do I have a case here for breach of contract, or perhaps promissory estoppel, as I have an email from the membership director promising reversion to my previous membership without additional fees? Should I proceed with a formal demand letter and potentially legal action? Any advice or similar experiences would be greatly appreciated.

Thanks for your input!