WONGA is so unprofessional

Wonga is ruining my credit score, he sold my account twice to debt collection company and never updated the other dept collection company. They sent me a paid up letter in January and only now Nimble has listed me with the bearues for being in arrears with my Wonga account and it has affected me badly because I am in a process of buying a house now nimble comes back showing on my credit profile as being in arrears. It's a mess because they received the payment from Shabbir and Shaik why am I being punished for something I already paid? When phoning them they always looking into it and their customer service consultants are always so blonde, either you hold on for more than 30 minutes all to find out the matter can't be resolved because of some stupid reasons.