Incorrect Recipient: ********** Service

I made a payment using my banking app and entered the incorrect recipient. I called their customer service center and was advised to forward my proof of payment to ***. This I did the very same day I paid. I continued receiving calls from MBD Attorneys telling me that my account was handed over. I called their customer care again and was told that my proof of payment was not received. I mailed the document again and was given a number to call their "finance" department and request them to update my account. I called the number and it was a wrong number. Called again the customer care center and the agent said that I can't call their finance department but the only way he could help was if I would send my proof of payment to his supervisor (Zaine Ibrahim) and it was gonna be sorted. This morning received an sms informing me about my overdue account. I called the center only to be told that I should not have used the app because it had a problem. That they couldn't help me because because this is an issue with finance. I need to pay for this month and I cannot do that with this issue spending. I have run out of options with these people. They give false information and scold their customers for making mistakes l.