They are robbing me money they deducting money from my account but not making update on their system then my amount is not increasing

They are robbing me money they deducting money from my account but not making update on their system then my amount is not increasing. I called them and went to their store to rectify this they showed me the amount left to pay which was less but when I got home I received a statement with the same amount not changed. I called they said I must wait 48 hours they have not gotten back to me since then