Paying for a service I am not receiving

on the 1st of August I app**** for the Telkom ADSL service. I opted for the R 699 uncapped 4 meg line. Until now, my supp**** Telkom modem has not worked. I have sent numerous requests and Telkom is very good at responding and testing the line. Because it is extremely difficult to speak to anyone due to high call volumes, I physically went to the Benoni Telkom shop and requested a technician to come to my premises to connect and set my modem up. The technician came out and found the modem to be faulty and suspected a cable fault as well. I have now paid for a month of usage ( R699 ) without actually been able to use it - this I feel is not right and I should be refunded for this.