Discovery paid my settlement amount

on the 23rd of April a payment ever since the 28th of April I have sent proof of payment to [Email Removed] [Email Removed] and [Email Removed] on almost a daily purpose but I have not received any feedback from them meanwhile they are still deduction my monthly instalment, I didn't mind the instalment for March because it was already too late but they debited on April and I am sure they will still debit in May. they need to know that them not accepting the money paid is disadvantaging me in sure a way that I can't apply to get another car because I am listed as a bad payer. I can apply for Motor financing as the amount paid is not clear on my name I have send 2 types of proof of payment but still nothing has been done.<br> please assist as