Vodacom account

I'm so disappointed from the service I get from vodacom especially as a paying client I have a cellphone contract with vodacom I took a A25 Samsung in August they had to debit the money first week of September they didn't second month still my account was on arrears so my device was locked due to an outstanding amount I went to vodacom store and pay the money they said I was owing but then my device was still locked I called vodacom but no help I was told to take the phone to the voda store the technician said to me I must pay R300 in order for him to wipe the phone for me mind you my phone have insurance it's been 3 weeks now no help they even block my number can't even call them