Debt i dont owe

I settled my Wonga debts 4 months ago via collection Company Saya Recoveries and received a paid up letter by Wonga. I have just received infomation that i am owing Nimble pay the same debt that i just settled. Nimble pay has not even been in contact with me to verify this information which seems very ***** . I have been in contact with Yumnah Hanervil from nimble and is not great help at all. I app**** for finance at a bank and my credit score has dropped beacuse of this and i was declined. Wonga and Nimble sort this out before i go to the ombuds. This is a nightmare