They are not providing this service anymore to all of their customers, but do I still have to pay interest?
The account isn’t closed, nor did the company sell their credit card accounts to another company. They basically decided to discontinue this product.
It depends whether your bank has closed shop completely, or they closed shop and sold your account to another bank.
If they closed shop, then they might be declaring bankruptcy. I don’t think you’d be impacted.
If they sold your account, then the other bank has the right to collect on the money that you owe.
Either way, it’s simply like this: as long as you have a balance on your [credit card] account, you WILL be charged interest.