Booking.com ****** me my money

I'm so disappointed with Booking.com. I made a booking with them for the 7th of August 2022 one night and paid using my credit card. Payment was confirmed and thus my booking was concluded. Two days later I modified my booking and added an extra guest, and additional amount was taken out of my credit card successfully. Only to discover on the day of my check in that they've canceled my reservation due to an invalid credit card and they refunded my money which was deducted of the cancelation fee. Which doesn't make sense to refund an invalid credit card.

Well to cut the long story short, I got at the hotel and had to make a new booking and pay again more than the amount I paid when booking online. Well all after I couldn't get assistance from Booking.com. I was stuck at the reception cold, tired and hungry for over 2 hours trying to get my matter resolved but the consultants would just keep me on hold for several minutes without reverting back to me, up until I ran out of airtime - reloaded and still the same thing happens.

I still don't understand why was I charged a cancelation fee were as I didn't cancel the reservation, wasn't it logical for them to contact me if they had issues with my credit card so I can find an alternative, but instead they decided to cancel my booking and charge me for it and making the whole experience that night inconvenient for me. What's more frustrating is that they took my money in full from the credit card they claim to be invalid and yet they refunded me 50% of the money they took from my credit card. How possible is it that they took money out of an invalid credit card. Doesn't make sense. If that night I had no money to make a new booking where were we gonna sleep as two ladies far away from home and family. I'm so disappointed.