Bad service

I went under debt review over a year ago. In the meantime I have managed to settle 2 of my loans. The first one loan was settled in October, and the second in November. I got paid up letters and sent these to Debtline. I asked them to not allocate payment to these paid up loans already, and restructure my payments to my other loans.

Turns out the first loan I settled, received payment end of October from the monies paid to debtline even after sending them a paid up letter and asking them to restructure my payments before the end of October. Which I find quite unprofessional. I was contacted thereafter by them and I received a refund. I was told profusely that this is now sorted out and wont happen again.

At the end of November I paid my monthly amount and again Debtline paid money to this settled account. Not only that, they paid the money to the second settled account too. Now I have to go through a whole process of getting refunds and my loans are just going to take longer to be settled.

How do I get them to actually just do their job that I am paying for.

Can anyone suggest who I can contact to actually receive this service.