Poor after sales Customer service

To whom this may concern:<br> <br> Please maintain the standard of service your company advertises. <br> <br> Call centre agents do not return calls. After numerous emails and calls to the call centre. What does it take to get customer service? <br> <br> The call centre agents are persistent when they want business from you and when it actually comes down to after sales service they lack in this regard. <br> <br> I would like to hear from Discovery management or the consumer department. <br> <br> Very unhappy with the after sales service.