DSTV , breach of contract

14 months ago I locked my premium for 24 months. My reason was,being a pensioner, my children contributed towards the premium because they could also watch on 3 extra platforms other than mine. A couple of months ago they informed me that that facility was no longer available for them to view. My contract premium was locked for 24 months thus my conditions should have been locked for the same period. I called DSTV and was told that to cancel my contract will result in penalties. I have not breached my contract. They are in breach