Review Deduction of extra money after paying my initial loan

I collected a loan from okash and I paid back today which is ********. I paid through the account number provided and sent proves to them. A customer service agent called me and confirmed it but to my surprise I received another debit alert of the same amount. I have called, texted and nothing has been done. Going by all I have read here it means they are doing it on purpose and they are scammers.