Refusing deposit allocation

I am tired of going back and forth with your company. You have a million excuses not to allocate the deposit I made from my banking app. Yes, I should not have used the "pay again" option from my banking history as it used the same reference number for the deposit I made in March. I have provided proof of payment, verified bank statements and screenshots. Agents do not have a clue what they are doing and some are even rude and sarcastic. I will not tolerate it. You will refund me my money immediately.