slow service

I received a special offer on email 3weeks back for their promotion of PVR lock price special of R899. They asked me to send an SMS they will call back. Till today this DP department of theirs haven't called. 3 days back I called to follow up and this guy Trevor Monana promised that they will call me before end of business day if he channels it himself. Yesterday I called as well to follow up and spoke with a Lady and as well she said in 2 hours they will call me. Lastly today I spoke with another lady and all these people are call centre agents and have no authority to follow up with this DP department. Instead they all send the message on a system..... Which means nothing cause I still don't get help from this DP department. I have all the names and surnames of these call center agents I spoke with. To top it all I spent over 60min with my airtime speaking with all these different people addressing the same issue, cause they are not allow to call people. This means I as a client who needs service from a supplier I should spent those minutes with my airtime and still pay Multi choice Premium charges each month. Very disappointing cause they make a lot of money.