Synchrony Bank Credit Card Complaint

Synchrony Bank Credit card department,

APR or interest rate Pennsylvania

The promotion for - furniture was not applied properly because on my account I incurred deferred interest when the payment were more than the minimum payment of $62.00 but payments were made of $150.00 for 2 years. Even if the payments were split there was plenty of money to cover the promotional period because the difference is $88.00. Interest was charged when it should not have charged. When I question the company about the payment they will not answer my question on why I was charged interest and when it happened.