Poor Service, Incorrect billing.

Start Pricelock on Explora 1 in Feb 2015. No concern very happy. Receive phone call in August to inform me that my price lock is not valid anymore and my bill will be R879 on a price lock for 24 months as from 01 September. On 01 September, R916 was deducted from my account. I then decided that it will be better to rather go for a Explora 2 Price lock of R959. I contacted DSTV and clearly explained to the consulted what I want. Cancel the old price lock and start a new one on the Explora 2. It will be the primary decoder and the old Explora 1 will become the Xtra view (secondary). After many 30+minute calls and promises that they will get back to me, I was under the impression the billing will be correct, R959 only. This month they deducted R1322 from my account. Very poor. I am too frustrated to spend more hours calling them.