Credit card

I have been a standard bank client for more than 10 years i have a personal and business accounts with them. My business is going through a bad patch and i am finding it difficult to make payments on my three credit cards because i am under financial stress. So i phoned the credit card division to make payment arrangements and i kept my promise to pay the agreed amounts on the dates they gave me they keep on sending me messages and calling me for money saying that they do not pick up the arrangements made but when i phone them they have it on the system, i phoned them 3 times on different days to make sure they have it on the system as they keep on harassing me for money i am on the point of giving up and stopping payments so the bank can do what they want like blacklist me or what ever i am fed up with this situation i am in, i do not want to run away as i phoned to make arrangements and kept my promise. I am very doubtful if someone will be able to help me as i am always by the looks of it talking to *********** people working at the call centre i am at this stage a very unhappy customer.