Contract reconnection

Had a data contract with Vodacom whereby monthly payments where made. I failed to make payments on 2 occasions then called vodacom to make arrangements to pay the amount outstanding, bare in mind that I paid the previous month instalment and was calling to arrange for the arrears. I spoke to a agent at Vodacom and we agreed for me to pay half now and the other half at the end of the month and stated he will reconnect my services as soon as I pay the first amount. I paid the first amount and called back and then their agents some of them utterly disrespectful, state that the system will not unlock even though I still have to pay this month instalment. If I could I port my number to another network because this is firstly unprofessional, unrealistic reason for not unlocking my phone and rather stupid. You can not tell me that a system is unable to unlock stating vodacom system controls them not the system being controlled by the company. This company is becoming increasingly irresponsible and turning to ******* as I have been a Vodacom client for more than a decade and currently I feel that the company has become ****. The worse part is that I was even refused to speak to their call centre manager. I sent a email to them but no response. I hate the fact that I use the number for business and have lost alot of customers because of this.