Booking.com Paid for Tickets, Got Covid, Tried using credits and we're never allowed to

DO NOT USE! TERRIBLE!!! My wife and I purchased our airline tickets from Booking.com and right before the trip I caught COVID. Booking.com told us we could rebook within the year and use our credits. We tried rebooking by calling their customer service as requested and we're never able to rebook. The Indian customer service Booking.com has outsourced to is TERRIBLE. SO INCOMPETENT! We tried multiple times and each time they would tell us that the issue has been forwarded and we should wait for a call back. Guess what? No call back ever. For weeks we tried resolving this issue, rebooking another flight, but each time they have an excuse and are unable to get us what we paid for. We tried going through to our credit card company, but they denied our request for credit card dispute. This is so terrible that Booking.com places ads all over the place and makes it seem like a great place to purchase your plane tickets, but when you need them they just throw you to some stupid call center in India where they don't help at all. It's so crazy and sad that a corporation like this can steal a customer's money and have no recourse. Please save yourself the stress and don't use them. Booking.yeah, more like Booking.yeahright. We love to take your money and not help you at all if there's any issues. Such BS.