Bad Bad Service

My woolworths account was handed over to MBD attorneys , and the account was paid at woolworths stores almost a year ago. I have been told at the time to request a paid up letter with these attorneys which I have done numerous times. I was told this would be emailed to me and I never get anything from them in my inbox . They are so *********** and cant solve a simple query such as this.

What is the use we are paying off our debts but still remain in default with the company which we owed. Why cant you give me this letter????