Money Pay Used My Money for 15 Days and Made Me Pay the Delay Interest

I carefully follow the payments in the Money pay account. I forgot my May 15th payment in the rush of the day, I remembered it at 23:23 in the evening and paid it from my wife's card at 23:40. The payment was not credited to my account. I made a phone call, sent a lot of e-mails, etc. Finally, friends finally detected my payment after 15 days. Finally. They transferred the money to the account and I went and made my payment. But as a result of their own incompetence, they made me pay the interest for the delay. It's not a significant amount, but it bothers me a lot to pay this money unfairly and to receive warning sms due to the delay in a way I don't deserve. And there is no apology, no phone call, nothing, I don't understand what kind of a commercial business this is. Friend, you took my money. You used it for 15 days and charged me interest for the delay. Shame on you.