Very bad ******* service

Vodacom contacted my husband to offer him a new contract, which he refused, as he is on prepaid. Unfortunately, it was activated. He has been billed for six months now for a handset he doesn't have and a contract he never asked for. Last week Vodacom told him to pay an amount of R350 or his phone will be shut down. He paid the amount because he needed his phone for work purposes. This morning he found that his service was completely shut down. He has phoned numerous times to report this ***** but to no avail. Is there anyone out there who will assist us? He can't be reached on his phone at the moment.