Bad Service

This Company dont know what they doing keep getting calls that I am in arrears with my account although I am paying Capital Data via Debit Order. I keep having to repeat the whole procedure every 2nd day. They keep saying they will look into it and then just call me again telling me my account is in arrears. This makes you think where is my money going that I am paying if they say I am in arrears. I have emailed my proof of payment numerous times, so who manages the emails and dont they make notes on their system, wasting everyone's time