MY ACCOUNT IS LOCKED AND OVERDUE BUT VODACOM TAKES THEIR MONEY EACH MONTH VIA DEBIT ORDER??????

I have been a Vodacom customer close on 20 years and they are going from bad to absolute worse. My husband and I are divorced and each time he pays his separate account with cash they allocate it to me. On top of that they double debit my account to rectify their problem then block my line for being overdue. When you phone them their system is down. My ex husband has been in their shop to complain countless times as his line is also blocked despite it being up to date as well.