Credit card — SYNCHRONY FINANCIAL (CA)

Unexpected increase in interest rate. On XX/XX/year> I was been introduced the carecredit ( synchrony financial ) at the XXXXXXXX XXXX XXXX XXXX XXXX XXXX they said it was an easy way to pay my debt with them and very easy to be aprove, NO INTEREST, .hassle free. So I opened the account borrowed { {$2900.00} }, They help me to dowload the CareCredit app and set up automatic monthly payments of {$79.00}. however that number decrease to {$67.00} in the following months, which was never agreed before. On XX/XX/XXXX they charge me {$950.00} and on XX/XX/XXXX they charge as automatic payment {$100.00} and even when they got the payment on time, on XX/XX/XXXX they charge Interest {$73.00}. When I called Carecredict they mention that my One year promotion was over and since I hadn't paid the t