Citibank Credit Card Complaint

Citibank Credit card department,

Customer service / Customer relations Rhode Island

I paid for a gym membership in -/-/2016 with Citibank CC. Payment was received by merchant and access granted to me. During -/-/- access to facility was denied for no known reason. I filed a dispute and money was returned to me. I also contacted the merchant who said access was denied in error. We agreed to make a new contract in - 2016. During - 2016 Citicards REVERSED the item and recharged me. I have emailed and called numerous times to get it removed permanently but to no resolution!