Terrible Service, Poor customer service

i was offered price lock deal by multichoice for the explora which is R649, on call with the consultant it was confirmed more than twice that I would only be liable to pay the R649 starting on my usual payment date. Now when calling the call centre I am advised that the amount due to pay Is over R800. when asked to explain why and how I am advised by the customer service consultants and a manager named Nombuhle that they cannot assist me with the query as they do not deal with price lock queries. When asked to speak to someone I am sent from pillar to post. what the point of customer service when no1 can help? I would like this query to be sorted out before the debit order goes no way in Hell am I going to pay over R800 when I was explained that I will only be paying the R649. IF that the case I want the price lock cancelled today! as I am typing I am still on hold at Multichoice for the past 30min, this is TERRIBLE service!! how to sell products to your customers , then when we have a query the customer cant assist or Xplain. Makes no sense!!