Discovery ***** department is *****ulent itself

I received a notification that someone is attempting to pay an airline with my predicated but it declined. I immediately called discovery ***** line and asked for assistance, the person who was helping me said he will cancel my card and order a new one. That was not done , the ***** star tried again within 2 days and this time it was successfull. Again I called discovery and told them about the incident and asked why did it go through if the card was cancelled? I spoke to 2 consultants and they both couldn’t give an answer. To me it was clear that someone did not do their job and I paid for it. Discovery reimbursed the money. 3 months later I received another notification that the same amount has been taken away by discovery( reversing the reimbur*****t) and again I called their ***** line , no one could tell me why and called their dispute line and they eventually got back to me saying the ***** department will call me next week to explain. That was in December.

The money made my credit card to be overdrawn. I had to pay penalties, extra interest for discovery.