Can not transfer airtime

<p>My wife dropped her phone 4 months before her update date and my 3g contract that I wanted to cancel was due for an upgrade. The sales lady at River square vodacom said that I can not early upgrade my wife's contract and that I should rather upgrade my 3g contract for a new phone and that I can transfer the airtime to my other contracts. 3 months later I have R 600 eairtime that I can not transfer and after numerous calls to vodacom and activating airtime transer services and increasing airtime transfer limits and even a sim swop. Please help me sort this issue out.</p>