TERRIBLE SERVICES

My MTN account was handed over to this company. There was a payment arrangement in place of which I abided to, however, MTN has now issued Nimble Credit Solutions to take over. The amount of R1300 was initially paid to SSDA and they have not paid that money to Nimble Credit Solutions hence the credit provider does not want to issue me with a paid up letter. How is this my problem when I have paid up this account???