No customer care or support

I just need to find out how does Vodacom get it right to block my number from there call center And nicely states. That my has been blocked. I have a problem on your Vodacom App. Where I can not purchase data or bundle. Because my airtime reflect at zero balance when I try to make a purchase. Whilst I have enough airtime. So the whole of Vodacom can not resolved this issue for me????? Please I am experiencing random issues with Vodacom And I am starting to think that my account is being tampered with. I need my number need unlocked and this issue resolved ASAP please????