Product: Credit card

I have a XXXX XXXX that was formerly an XXXX credit card. The XXXX credit card changed to the XXXX XXXX without my consent, and ever since that happened I have not been able to make a successful payment. The new company that issued the XXXX XXXX takes approximately XXXX weeks to process payments, if it even processes them at all. The first time I tried to make a payment was on XX/XX/XXXX. My payment was returned after a long processing time. The time that elapsed between when I first made the payment and when they actually tried to take the payment from my checking account caused an oversight. This is because my account was marked as current and paid, so I thought my payment had already been processed from my bank when it did not actually get taken out within a couple days like most creditors would do. This oversight caused me to miss my XXXX payment and therefore incur late fees and negative credit reporting because the payment took almost a week to process. By the time it did, there were no longer sufficient funds in the account due to another bill coming out. I would have put more money in the account for my new bills from other debts I was simultaneously paying if I didnt think XXXX  had already taken their payment out, due to them marking the account as paid and current and about XXXX weeks time having passed. I was going to overlook this incident and move on making timely payments with XXXX, because although business practices of XXXX ( waiting so long to debit the payment ) are shady, the oversight of the funds I had available at the time was my fault. However, my true formal complaint lies in the fact that on XX/XX/XXXX I attempted to bring my account current by paying {$190.00} which was the past due balance. XXXX marked the account as current yet again, but my payment was not taken out of my bank account. Due to my previous experience, I called customer service to ensure my payment had gone through this time, and the representative said the payment had, indeed, gone through on their end. She assured me that my payment would be processed and taken from my bank account by XX/XX/XXXX. It wasnt until XX/XX/XXXX that XXXX returned my payment. When I called and spoke to another customer service representative, she reviewed my bank account numbers with me and confirmed they were entered correctly, but said that my payment could not be processed. When I asked why the payment could not be processed, considering my account numbers were correct and I had sufficient funds to pay the amount, she said it must be a problem with my bank and there was nothing I could do other than call my bank. I called my bank and confirmed there were no holds on my account, my routing and account numbers were correct, and my other bills were being processed as usual. I came to the conclusion this problem is an issue on XXXX XXXX end, and obviously I cant make a payment if they will not accept my payment. However, that is no fault of mine and I should not be penalized with late fees and negative reports on my credit if they are not taking my payment out of my federally backed bank account ( XXXX XXXX  ) and can not even tell me the reason why they are refusing to accept my payment. I have paid my former XXXX card with the same checking account and have never had an issue using it with them or any other bills. It is my main checking account and I use it for most of my personal payments. XXXX has proceeded to report to the credit bureaus that my payment is over XXXX  days late, dropping my credit score by over XXXX points. That would not be the case if they would have taken the payment when it was paid. Sadly, it seems as though this company is trying to scam consumers to get late fees and higher interest charges even when payments are made on time. They are not taking the payments when they are made, and then they are charging extra fees and negatively affecting my credit when I did, in fact, make the payment on the due date. I want these late remarks removed from my credit reports. This company should not be allowed to scam consumers by taking so long to process payments and then refusing payments with no reasonable explanation and charging late fees. The way they do business is unfair and unethical.