Synchrony Bank Credit Card Complaint

Synchrony Bank Credit card department,

APR or interest rate New York

Synchrony Bank applied a promotion to my account without advising me that I had a year to pay it off with no interest and that if I did not I would incur interest form the date of the loan. I log on and find a interest fee of $1500.00. I called they could do nothing. I find it deceitful. I should have been advised of the promotion and given the option to accept it.