bad service

so i have an account with Ackerman and defaulted ok i then started to pay the areas so i started with R500 and next payment R644 on 20/11/2020 but i could not go in and 3days passed and had money on the 24/11/2020 but now it had changed from R644 - R848 in space of 3days, Samantha Applegate <***> worse in assistance, she gets mails and never capture and they will be sending automated emails non stop and claim they tried calling but fails to respond on emails and even when received communication its never captured. can we please be aware and know how we are charged. i am really questioning the charges it would make sense if month ended and new month but in one month so the arears they claim is it even right charges?