No Service after 10 days and its a reccuring issue

After logging a call more thatn 10 days ago we have contacted telkom again and was told that they are aware of the issue with the initial SLA being 10 days we still have no service however more and more over the last 5 months whenever telkom is repairing land line faults in the area it always seems to be our telephone that goes back to being out of service. the reference number we have is 38cwz100515. i am thinking about installing a 10mb ADSL line but if this is the service we get continuously how could I trust that my service will be continual when telkom fails to provide this simple service. it forces me to reconsider other service providers. this fault is a real inconvenience as my father has been communicating via telephone with people in Johannesburg regarding his provident fund payout and it has become frustrating cause not only do we have issues with no service but on more than one occasion when the phone has been used we hear the technicians on the line. could someone please help.