Pathetic customer service

Terrible , closing my account with immediate effect- i have an account with yde and payment is arranged through a debit order , in november they did not debit my account because they had a problem with a company called MBD which was running debit orders on their client s account , i was never informed that they did not debit my account, early december i got an sms to say pay within 7days i contacted the customer service department to find out what had happened only to be told the story of mbd , why i wasnt called to be informed that they would not run a debit order is beyond me , i then arranged for the whole outstanding amount to be debited on the 22nd of december which they did debit , the pathetic service lies on the fact that they negatively adjusted my credit report as a non payment for the month of November which my credit score dropped drastically , i am in a process of applying for a home loan and their error is affecting me badly to make matters worse they still havent updated the debit order that went through on the 22nd as payment received on my credit profile , i have emailed them and the response was will get back to you in 48 hours it is now 4 days , i dont understand why their error has to impact my credit profile , i will take this matter to my lawyers should i be declined for a home loan this is unaccaptable , i need my yde account closed with immediate effect as full payment has been made.