Contract Phone ****** - Vodacom cant pick up on sy

I have had my samsung S5 LTE ****** and contacted vodacom to block the phone. after numerous calls all week i finally get throught to zanele. she apparently cant pick up a samsung contract on my acc so she advises that she will call me back. She calls back 30 mins later to advise me once again that there is no samsung on my contract? how? i paid in excess on that contract to get a samsung S5. does this now mean that i no longer have a contract to pay with vodacom? my line has een suspended so i also called for banking details but the call centre agent doesnt have it. they sms to say i must take my statement into the bank to pay? I DONT HAVE A STATEMENT THAT IS WHY I CALLED.....WHY OH WHY???