Unfair treatment

I am reporting payment that was already charged overdue amount done on the 01st/03/2024 My query is that I did not paid my account of which it was done through EFT. I sent proof of payment on the 24th/03/2024 and received an email from Miladys that the matter will be resolved in 24 to 48 hours but up to date nothing was resolved instead more interest was charged on my account because the matter was not yet resolved and more messages was sent to me reflecting that I must pay the account. My account no. is *** ID no. ***. I am not happy about this because always I do pay my account on time and through EFT but now it seems I am not liable and receiving calls and also messages that are irritating. I even went to Miladys Harvest Mall on the 22nd/04/2024 to find out and was given the email address to send the proof of payment of which I did but nothing is resolved. May Miladys resolve the matter as soon as possible and deduct interests charged on my account unfairly.