Impossible to get proper assistance

<p>We upgraded our existing subscription to the pricelock option, we received the decoder but did not activate it as we were waiting for our new t.v to arrive. We finally received our new TV, called DStv and arranged for installation, installers installed the new decoder and when trying to activate it we find that we have been billed for the new decoder since we received it and effectively double billed while using only the old decoder, and now there is an outstanding amount due. On top of that we were not aware of the second bill as we it was set to cash payment while we use a debit order for the existing subscription. After numerous calls advising the call centre of our situation and offering to pay the difference between the two subscriptions we get the same response. We were not advised of a second subscription being created when we upgraded, we expected it to be exactly that, an upgrade on our existing sub and not an additional sub. Can someone apply some logic to this matter and see the issue for what it is? We have not been using two decoders at the same time, we happy to pay the difference between the two subscriptions since the new decoder was delivered and us activating it. but not the full pricelock amount for the period that the decoder was not connected. </p>