Softlocking my account

Vodacom keeps softlocking my account, I have a debit order and without fail when the debit order date falls over a weekend my account is suspended. When I call the complaints, I get a massage saying that my accountnis not in arrears. They say they cannot debit accounts over a weekend. I have tried numerous times to resolve this, but can never speak to someone who can sort this problem out. When I call the call centre the operators always say they will get someone to call to sort this out, which off course never happens.I am fed up with vodacom, and there bad service.