Dstv changed package with my consent

I am extremely disappointed with how Dstv manages my account subscription without my consent. I was on Compact package but the upgraded without my consent to Premium package. I called them then they said it will be changed on the next payment, I checked on the next payment date but nothing changed. I am now unable to reconnect as I cannot pay a package which I never signed for, they said it was a bonus but my question still stands as "was there any agreement".