My experience with Vodacom has been nothing but frustrating

My experience with Vodacom has been nothing but frustrating. For some reason the phone I bought from cellucity has been blacklisted. I bought the phone brand new. I submitted un blacklist form and the phone work but it stopped working again. Vodacom hasn't been helpful in this situation. I'm told I'll need to resubmit the form again which is costing me money going back and forth to the store