Metyrofibre is a Shame, their service is immature

My daughter paid the in the premiums on 31.05.2024, since then, my service with Metrofibre has been disconnected more than ten times for non payment on my account, i have sent the proof of payment more than 4 times, yesterday (29.09.2024) my service was disconnected again, I was told that they are still investigating the payment made on 31.05.2024, how can it take such a long time to allocate the payment?why cant they hire an accountant with knowledge? why should they disrespect my being like this?