*****ulent Double Payment by Mpowa

I had a loan with Mpowa and I settled the account via Ozow option and I woke up to a debit order from Mpowa for the same amount. I called their office at exactly 7am, selected option 3 and was rudely assisted by a rude gentleman, whom I didn't even catch his name. I wanted to enquire as to why the debit order went off, when will they rectify their mistake and when will they refund me, all those were not answered as he hanged up, mind you I am the one who called due to their *****ulent transaction as they now double pad themselves and now I have to wait until God know when for my money to be paid back into my account.