Unfair and unjust suspension of phone

Vodacom has suspended my account as such I can not make any calls or receive calls (this includes calls to customer care. I had to call customer care using another phone and they referred me to their virtual assistant Toby who can not help me. I don't owe Vodacom a cent, am on a prepaid account that is on a positive balance and I have no contracts with Vodacom.

How do you suspend my phone with no reason and leave me with no way of fixing this issue?