Contract has always been a issue

I recently ported my number from Cell C to Vodacom. I was excited with my choice, how wrong was I. The porting of the number took much longer than it was supposed to. Basically every step of the transfer had some problem or hold up. The staff at Mall@Reds kept passing the buck and blaming other departments. Got through it eventually and finally the contract was set up. Today I tried to load additional airtime; this should not be a problem as I have a Youchoose package and I have loaded airtime before. I keep receiving error messages. I phoned customer care and was told I owe Vodacom money and have been handed over to legal. It is impossible that I owe money. I told the consultant this and she decided to put the phone down in my ear. The debit order for the new contract went through on the first day of the month. My old contract is still being deducted as well. I phoned legal and they have no record of me owing anything. So now my question. Is there someone competent and considerate at Vodacom who can assist me? I need to know that my old contract is cancelled. I need to know why Vodacom is claiming I owe them money? Finally I need to load the airtime so I am able to use my phone.