Credit card or prepaid card — SYNCHRONY FINANCIAL (MD)

Didn't receive advertised or promotional terms. Background information : CareCredit offered me a promotion of no interest incurred if payed in full within a specific time which would have ended XX/XX/2023. Months prior to that, I signed up for CareCredit to automatically withdraw XXXX on every XXXX of the month. When I looked at my statement I saw that I would have to pay an additional XXXX for the month of XX/XX/XXXX in order to complete the promotional period of no interest successfully. So I paid XXXX on the XXXX of XXXX and the automatic XXXX withdrawal that takes place on the XXXX of every month would have paid off my promotion and I would not have incurred any interest. CareCredit and their underhanded devious tricks only debit an automatic payment on the XXXX of XXXX for XXXX to