No feedback from Altech autopage

I have had renewed my contract early march with Altech Autopage and notified them that this contract must only start as of the 1st of June, however once documents was processed to head office they had immed kicked me into the new contract, however in the interim my March billing has reflected that i was charged for double handset fee, I called the call centre and complained to them and since no feeback, When i called again i was informed that the call was eculated to billing department and should be sorted, Then i received my April statement and still no credit on my statement, I called again and same was told to me that they are sorting the billing, i have sent a email to the service desk and still no response, Highly frustrated and awaiting a response from Altech autopage on the credit,Should i as a customer not pay my account how fast you as a service provider wil disconnect my account, put what kind of ppl you have working in that area,<br> I await your response, cos holding on your call centre line and waiting to speak to a somone your lines goes dead and then my airtime is used up, Please sort your call centre out and provide me with feedback<br>