9 months later they still say problem resolved.

I have a contract with vodacom. A primary number and a secondary number (2 different numbers) running for the past 9 months...since taking up this contract,I have called vodacom nearly every month to just simply send the appropriate text and data notifications to the individual lines ...i have come to accept that it's so difficult to do as i get notifications from the secondary line on the primary line which is so irritating. All the agents tell me its resolved but still 9 months later I still have to swallow this disgusting service. Somebody please help !!!!!!