GE Capital Retail Credit Card Complaint

GE Capital Retail Credit card department,

APR or interest rate Pennsylvania

I signed up for a promotional sales with Synchrony Financial through home design store with a credit limit of $3000.00. I went ahead and bought some furniture in the store in the amount of -, I was asked if am going to do the two years promotional purchases they have i said yes, so they charged me additional $300.00 which brought my total expense to - with no interest if paid within two years. All of a sudden am being charged interest fee and additional late fee whereas I was informed neither of this will take place if the debt is paid within two years and if not I will be charged accrued interest from the time of purchase.