Problem when making payments: Credit card

I got a letter from the credit card company stating that my check was returned for my payment. I had my daughter call and talk to them. My daughter gave the lady on the phone my account information and she was told the payment went through. A couple of days later, I tried to use my card and it was declined. I had my daughter call Citibank again and she was told the same thing, the payment didn't go through. We went to a branch location and the person who helped us had called a customer service rep. My daughter spoke with her and she admitted that the person who entered the account number entered it incorrectly but unfortunately, there was nothing they could do because the account was already closed. I asked about my dividend dollars that was owed to me and they said that they could not sent that to me. I have been with them for 22 years and this is not fair.