Phone Line Suspended Automatically Everyday

I have been facing the issue since 31st Of July , my phone is being soft locked everyday due to some issue with with my contract. I am a user of vodacom almost more than 3 year and this never happened , now they are giving excuse that my contract amount is more then the allocated limit. If that's the case then why it has never happened in last three years , why suddenly now? Although I have escalated this issue several times , I have to call them everyday to unlock my phone and tolerate their nonsense excuses. Now because of this issue I am unable to make calls in the evening after 6 after 31st July and wasting my time speaking to your customer case. The reason I was silent for 4 days because I don't to go through the pain of signing up a new contract with another provider , But I think now it's time to switch to a new provider and I am going to do so If this happens again tomorrow.